CN113492739A

CN113492739A - Child seat and cushion structure

Info

Publication number: CN113492739A
Application number: CN202110347210.8A
Authority: CN
Inventors: 河野治生
Original assignee: Graco Childrens Products Inc
Current assignee: Graco Childrens Products Inc
Priority date: 2020-04-06
Filing date: 2021-03-31
Publication date: 2021-10-12
Also published as: JP2021165072A; JP2024040225A

Abstract

The invention aims to provide a child seat and a buffer structure, which can correspond to the growth of a child and can absorb impact by a simple structure. A child seat is provided with: a seat body having a seat portion and a backrest portion; and a cushion structure (4) which includes a support surface (41) for supporting the back and hip of a child lying on the back from below and is detachably attached to a corner portion formed by the seat portion and the backrest portion. The buffer structure (4) comprises a first buffer (40A) and a second buffer (40B); the first cushion body (40A) extends in a direction orthogonal to the support surface, and the second cushion body (40B) extends in the same direction as the first cushion body and has a cushioning property different from that of the first cushion body.

Description

Child seat and cushion structure

Technical Field

The present invention relates to a child seat and a cushion structure.

Background

In general, when a child whose neck is less than one year old has not yet been supported is seated in a child seat, the child seat is kept lying substantially in a tilted-up state rearward with respect to the traveling direction of the vehicle, and is fixed to the child seat by a strap. In such a state, when an impact from the front is received due to an accident, an emergency brake, or the like, the child moves forward due to the reaction force thereof, and the impact is concentrated on the shoulder portion of the child via the shoulder straps in order to suppress the movement of the child.

Further, as a child seat having a structure capable of mitigating an impact from the front, for example, Japanese patent laid-open Nos. 2009-161010 (patent document 1), 2003-63291 (patent document 2), 2004-217038 (patent document 3), and 2008-184133 (patent document 4) are given.

Patent document 1 discloses that an impact is absorbed by an angle changing portion that deforms in a direction that reduces the backrest angle.

Patent documents

2 and 3 disclose that when an impact is applied, the back portion is rotated in the rising direction, and the impact is absorbed by the impact absorbing member. Patent document 4 discloses that when an impact is applied, a lever portion connected to a link arm is moved in accordance with the rotation of the link arm.

Documents of the prior art

Patent document

Patent document 1 Japanese patent laid-open publication No. 2009-161010

Patent document 2 Japanese patent laid-open No. 2003-63291

Patent document 3 Japanese patent laid-open publication No. 2004-217038

Patent document 4, japanese patent application laid-open No. 2008-184133.

Disclosure of Invention

(problems to be solved by the invention)

The corner changing portion of patent document 1 is fixed to the child seat, and therefore cannot cope with the growth of the child. Further, the child seats of patent documents 2 to 4 have a complicated structure because a plurality of members are used as the structure for absorbing the impact.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a child seat and a cushion structure that can absorb an impact with a simple structure in accordance with the growth of a child.

(means for solving the problems)

A child seat according to an aspect of the present invention includes: a seat body having a seat portion and a backrest portion; and a cushion structure body which includes a support surface for supporting the back and hip of a child lying on the back from below and is detachably attached to a corner portion formed by the seat portion and the backrest portion; the shock absorbing structure includes a shock absorbing cushion body having a first cushion body extending in a direction orthogonal to the support surface and a second cushion body extending in the same direction as the first cushion body and having a different cushioning property from the first cushion body.

More preferably: the first cushion body and the second cushion body extend linearly in the front-rear direction.

More preferably: at least one of the hardness and the shape of the first buffer body and the second buffer body is different.

More preferably: the first buffer body and the second buffer body are triangular when viewed in longitudinal section.

More preferably: the shock absorbing structure further includes a case surrounding a surface other than the support surface among the shock absorbing body.

A child seat according to an aspect of the present invention includes: a seat body having a seat portion and a backrest portion; and a cushion structure detachably mounted at a corner portion formed by the seat portion and the backrest portion; the cushion structure can take a first mode in which the back and hip of a child lying on their back are supported from below at an approximately horizontal angle during normal use, and a second mode in which the cushion structure deforms flatly along the backrest portion to receive a load when the load is applied to the backrest portion to move the child sharply.

More preferably: the cushion structure comprises a support surface for supporting the back and hip of a child lying on the back from below at an approximately horizontal angle; in the first aspect, the thickness from the intersection of the backrest portion and the seat portion to the support surface is 70mm or more.

More preferably: the load is more than 10 kg; in a second aspect, the thickness from the intersection point of the backrest portion and the seat portion to the support surface is 45mm or less.

More preferably: the angle of the support surface is 20 DEG or less with respect to the horizontal plane.

More preferably: the cushion structure includes an impact absorbing cushion body having a support surface; and a case surrounding a surface other than the support surface among the shock absorbing buffer bodies.

More preferably: the hardness of the outer shell is higher than that of the impact absorption buffer body.

More preferably: further provided with: a waist belt for restraining the waist of a child seated on the seat body; and a crotch strap for restraining a child seated on the seat body; the shell has a pair of waistband guide grooves for passing the waistband through the side surface of the shell; and a band guide groove formed on the front surface of the housing and through which the band passes.

The buffer structure body of one aspect of the invention is detachably installed at a corner part formed by a seat part and a backrest part of a child seat, wherein the buffer structure body is provided with a seat part abutting surface abutting against the seat part; a backrest abutting surface abutting against the backrest part; and a support surface for supporting the back and hip of the child lying on the back upward from below by the flat surface; the cushion structure can take a first mode in which the back and hip of a child lying on their back are supported from below at an approximately horizontal angle during normal use, and a second mode in which the cushion structure deforms flatly along the backrest portion to receive a load when the load is applied to the backrest portion to move the child sharply.

(effect of the invention)

The invention provides a child seat and a cushion structure, which can correspond to the growth of a child and can absorb impact by a simple structure.

Drawings

Fig. 1(a) to 1(C) are views showing the child seat according to the present embodiment, fig. 1(a) shows a state in which the cushion structure is attached and faces rearward, fig. 1(B) shows a state in which the cushion structure is detached and faces rearward, and fig. 1(C) shows a state in which the cushion structure faces forward.

Fig. 2 is a perspective view of the cushion structure according to the present embodiment.

Fig. 3(a) to 3(C) are exploded perspective views of the cushion structure of the present embodiment, fig. 3(a) shows a housing (housing), fig. 3(B) shows an impact absorbing cushion body, and fig. 3(C) shows first and second cushion bodies, respectively.

Fig. 4(a) and 4(B) show a state in which the cushion structure is mounted and directed rearward, fig. 4(a) shows a state in which no impact is applied, and fig. 4(B) shows a state in which an impact is applied.

Fig. 5(a) is an enlarged view of fig. 4(a), and fig. 5(B) is an enlarged view of fig. 4 (B).

Description of reference numerals:

1 child seat

2 base body

3 seat body

4 buffer structure

31 seat part

32 back rest part

33 waist belt

34 shoulder strap

35 step belt

36 buckle

40 impact absorbing buffer

40A first buffer

40B second buffer

41 support surface

Side 42

43 first bottom surface

44 second bottom surface

45 long side

46 first short side

47 second short side

50 outer cover

51 upper surface of

52 side surface

53 bottom surface

54 seat abutting surface

55 backrest abutting surface

56 recess

56a first bottom surface

56b second bottom surface

56c side surface

57 waistband guide groove

58 stop belt guide groove

A1 intersection point

A2 intersection point

T1 thickness

T2 thickness

Angle theta 1

Angle theta 2

Angle theta 3.

Detailed Description

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and description thereof will not be repeated.

(outline of child seat)

The child seat 1 of the present embodiment will be described with reference to fig. 1(a) to (C). In the description of the child seat 1, the front-rear direction corresponds to the front-rear direction of the child seat 1, and the left-right direction corresponds to the left-right direction when the seat of the child seat 1 is viewed from the front.

The child seat 1 of the present embodiment is a device that is disposed on a seat of a vehicle and is used to safely ride a child such as an infant or a young child. The child seat 1 includes: a base body 2 and a seat body 3. The base body 2 is mounted on a seat of a vehicle. The base body 2 includes: a vertical part abutting against the backrest of the seat, and a horizontal part abutting against the seat of the seat. The seat body 3 is attached to the upper side of the base body 2 and is supported to be rotatable with respect to the base body 2. The seat body 3 is fixed at least in a rearward direction and a forward direction.

The child sits on the seat body 3. Therefore, the seat body 3 has a seat portion 31 for supporting the buttocks of the child and a backrest portion 32 standing from the rear of the seat portion 31 and supporting the back of the child. The angle of the seat portion 31 and the backrest portion 32 is fixed, and the angle of the backrest portion 32 with respect to the seat portion 31 is, for example, 80 ° to 100 °. That is, the backrest part 32 cannot be tilted forward or backward. Cover members are detachably attached to the seat portion 31 and the backrest portion 32, respectively. These covering members are formed of a soft cloth member, for example, a cushioning material.

A waist belt 33 for restraining the waist of the child seated on the seat body 3 is provided between the seat portion 31 and the backrest portion 32. The seat portion 31 is provided with a crotch strap 35 that restrains the child seated on the seat body 3 from sitting on the crotch. The backrest 32 is provided with a shoulder belt 34 for restraining the shoulder of a child seated on the seat body 3. The

straps

33, 34, 35 are connected near the abdomen of the child by buckles 36 provided at the front ends of the

straps

33, 34, 35. These

straps

33, 34, 35 are so-called five-point straps. The waist belt 33 and the shoulder belt 34 may be formed not by separate belts, but by a single belt, for example, and may be provided continuously.

When a child under one year of age is seated in the child seat 1, as shown in fig. 1(a), the seat body 3 is oriented rearward with respect to the base body 2, and the cushion structure 4 is attached to a corner (corner) formed by the seat portion 31 and the backrest portion 32. The child seat 1 is set in a bed surface state by the installation of the cushion structure 4. The bed surface state is a state in which the back and the hip of the child are at a substantially horizontal angle.

When a child of about three months to about twenty-four months old is seated in the child seat 1, the cushion structures 4 arranged at the corner portions are unloaded while being kept in a state of being directed rearward, as shown in fig. 1 (B). The child car seat 1 is set to a chair state by detaching the cushion structure 4. The chair state is a state in which the back and hip of the child are held at an angle. The bed surface state and the chair state will be described later.

When a child aged about fifteen months to about four years old is seated in the child seat 1, as shown in fig. 1(C), the seat body 3 is oriented forward with respect to the base body 2 in a state where the cushion structure 4 is unloaded. The seat body 3 is inclined forward with respect to the base body 2. Accordingly, the child seat 1 is in a chair state in which the back and the hip of the child are held at an angle as compared with fig. 1 (B).

As described above, the cushion structure 4 is used when a child under one year of age is seated in the child seat 1, as shown in fig. 1 (a). Next, the cushion structure 4 will be described.

(buffer structure)

Further referring to fig. 2 to 5, the cushion structure 4 is detachably attached to a corner portion formed by the seat portion 31 and the backrest portion 32. The cushion structure 4 includes: an impact absorption buffer body 40, and a case 50 surrounding the impact absorption buffer body 40.

As shown in fig. 2, 3(B), and 3(C), the shock absorbing and cushioning body 40 has flexibility, restorability, cushioning properties, and the like, and absorbs a shock from a support surface 41 described later. The shock absorbing and cushioning body 40 has, for example, a substantially triangular columnar shape, and is formed, for example, in a triangular shape in a longitudinal section. The impact absorption buffer 40 is a foam of a synthetic resin having open cells, and is formed of urethane (urethane), for example.

As shown in fig. 3B, the impact absorption and cushioning body 40 is disposed such that the long side 45, which is the longest side, among the pair of side surfaces 42 in the substantially triangular shape faces upward, and the surface (the surface having the widest area among the surfaces) in which the long side 45 forms a part of the peripheral edge becomes the supporting surface 41. The support surface 41 has a substantially rectangular shape in plan view. The support surface 41 will slope downwardly towards the child's foot end.

The pair of side surfaces 42 has a long side 45, a first short side 46, and a second short side 47, and is positioned at an angle between the first short side 46 and the second short side 47, for example, formed at 80 ° to 100 °. The first bottom surface 43 and the second bottom surface 44, which form a part of the peripheral edge of the first short side 46 or the second short side 47, are arranged so as to face the housing 50 side.

As shown in fig. 1(a), in a state where the child seat 1 is oriented rearward and the cushion structure 4 is attached to the corner portion of the child seat 1, the back and the hip of the child lying on the back are supported by the support surface 41 from below at an approximately horizontal angle. That is, the supporting surface 41 is a portion for supporting the back and the hip of the child. In this case, the angle θ 1 of the support surface 41 is 20 ° or less, preferably 15 ° or less, with respect to the horizontal plane. If the angle exceeds 20 °, the angle between the back and the hip of the child becomes too large, and the child is not suitable for a child whose neck is not supported by the child. In addition, if the angle is 15 ° or less, the back and the legs of the child can be further held in a state of no angle. In this way, the bed surface state is a state in which the back and the hip of the child are supported at an approximately horizontal angle, specifically, a state in which the angle θ 1 of the support surface 41 is 20 ° or less with respect to the horizontal plane.

As shown in fig. 1(B), in a state where the child seat is oriented rearward and the cushion structure 4 is unloaded from the corner portion of the child seat 1, the covering members of the seat portion 31 and the backrest portion 32 of the child seat 1 come into contact with the back and the hip of the child. In this case, the angle θ 2 between the seat portion 31 and the backrest portion 32 of the child seat 1 is 30 ° to 80 ° with respect to the horizontal plane. If the angle is less than 30 degrees, the bed surface state is too similar, and if the angle is more than 80 degrees, the angle between the back and the hip of the child is too large, so that the child is not suitable for children of about three months to about twenty-four months. In this way, the chair state is such that the angle θ 2 between the seat portion 31 and the backrest portion 32 is 30 ° to 80 ° with respect to the horizontal plane.

As shown in fig. 3(B) and 3(C), the shock absorbing cushion body 40 is formed by stacking a plurality of first cushion bodies 40A and a plurality of second cushion bodies 40B. The first buffer 40A and the second buffer 40B have different buffering properties. The different cushioning properties are different in at least one of hardness and shape. In the present embodiment, the first and

second cushion bodies

40A,40B have different hardness, and the hardness of the first cushion body 40A is set higher than the hardness of the second cushion body 40B.

As shown in fig. 3(C), the first cushion body 40A and the second cushion body 40B have substantially the same shape and are substantially triangular columns. First, the

second buffer members

40A,40B extend in a direction orthogonal to the support surface 41. Specifically, the first and

second cushion bodies

40A and 40B extend linearly in the front-rear direction (extending direction of the body of the child). That is, the first buffer 40A and the second buffer 40B are stacked in the left-right direction.

The first and

second buffers

40A and 40B may be alternately arranged, and for example, the center portion in the left-right direction may be the first buffer 40A having a low hardness and the left-right direction may be the second buffer 40B having a high hardness. In this way, since the first and

second cushion bodies

40A,40B have the same shape and are stacked in the left-right direction, the first and

second cushion bodies

40A,40B can be easily replaced, and the entire impact absorption cushion body 40 can have the most appropriate cushioning hardness. In addition, from the viewpoint of setting the hardness, it is preferable that the first and

second buffers

40A and 40B are not fixed by an adhesive or the like.

As shown in fig. 3(a), the outer shell 50 surrounds the shock absorbing and cushioning body 40 except for the support surface 41. The housing 50 abuts against the seat portion 31 and the backrest portion 32. The housing 50 is formed of, for example, synthetic resin, typically urethane. The hardness of the outer shell 50 is set higher than that of the impact absorption buffer 40.

The housing 50 includes an upper surface 51, a pair of side surfaces 52, and a bottom surface 53. As shown in fig. 5(a) to (B), the bottom surface 53 has a seat abutment surface 54 that abuts the seat 31 and a backrest abutment surface 55 that abuts the backrest 32. A recess 56 is formed substantially in the center of the upper surface 51. The thickness of the seat contact surface 54 and the backrest contact surface 55 is preferably 10mm to 25mm, and the thickness of the intersection point where the seat contact surface 54 and the backrest contact surface 55 intersect is generally 25 mm.

As shown in fig. 3(a), the recess 56 includes a first bottom surface 56a, a second bottom surface 56b, and a pair of side surfaces 56 c. The impact absorption buffer 40 is disposed in the recess 56. Therefore, the first bottom surface 56a of the recess 56 abuts the first bottom surface 43 of the shock absorbing and cushioning body 40, the second bottom surface 56b abuts the second bottom surface 44 of the shock absorbing and cushioning body 40, and the pair of side surfaces 56c abut the pair of side surfaces 42, respectively. In this way, the four surfaces except the support surface 41 of the shock absorbing and cushioning body 40 are in close contact with the concave portion 56. The

surfaces

56a,56b,56c of the concave portions and the shock absorbing and cushioning body 40 may not be fixed by an adhesive or the like.

The housing 50 further has a pair of belt guide grooves 57 through which the belt 33 passes and a belt stopper guide groove 58 through which the belt stopper passes on the front surface of the housing 50. The belt guide groove 57 is formed by cutting the pair of side surfaces 52 from the upper surface toward the bottom surface 53. The belt stopper guide groove 58 is formed by cutting from the upper surface 51 toward the seat contact surface 54.

The cushion structure 4 is in a first state (fig. 4 a and 5 a) in normal use, and can take a second state (fig. 4B and 5B) when a load (impact load) for abruptly moving a child is applied to the backrest portion 32.

As shown in fig. 4(a), when the cushion structure 4 is in the first state, the cushion structure 4 supports the back and the hip of a child lying on its back under the age of less than one year from below at an approximately horizontal angle. That is, during normal use, the impact absorption buffer 40 and the housing 50 are hardly pressed, and the state of the bed surface in which the angle θ 1 of the support surface 41 is 20 ° or less with respect to the horizontal plane is maintained.

As shown in fig. 5(a), the thickness T1 of the cushion structure 4 is, for example, 70mm or more, and preferably 90mm or more. Here, the thickness T1 is a distance from the intersection point a1 to the intersection point a2, the intersection point a1 is an intersection point where the seat contact surface 54 and the back contact surface 55 intersect, and the intersection point a2 is an intersection point of a line extending in the vertical direction from the intersection point a1 and the supporting surface 41. The thickness T2 shown below is also the same. When the thickness T1 is 70mm or more, the corner portions can be filled up, and the back and the hip of the child can be supported at an approximately horizontal angle. When the thickness T1 is 90mm or more, the child can support the back and the hip of the child at an approximately horizontal angle without being restrained even if the child's body is large. In addition, the thickness of the housing 50 connecting the intersection points A1, A2 is typically 25 mm.

As shown in fig. 4(B) and 5(B), when the cushion structure 4 is in the second state, the cushion structure 4 is pressed by the load applied thereto, and is deformed flatly along the backrest portion 32. Specifically, when a load of 10kg or more is applied to the backrest portion 32 to abruptly move the child, the cushion structure 4 is in a chair state in which the angle θ 3 of the support surface 41 is 35 ° to 45 ° with respect to the horizontal plane. Thus, when a load of 10kg or more is applied to the child, the child is set to have cushioning properties such as a chair state from the bed surface state. The load that moves the child suddenly is, for example, an impact from the front, such as a collision of the vehicle or an emergency brake. The term "flat" means that at least the cushion structure 4 is elongated in the vertical direction along the backrest portion 32, and also includes elongated in the front-rear direction along the seat portion 31.

When a load of 10kg or more is applied, as shown in fig. 5(B), the thickness T2 from the intersection point a1 where the seat abutment surface 54 and the backrest abutment surface 55 intersect to the intersection point a2 of the support surface 41 is, for example, 45mm or less, and preferably 20mm or less. If the thickness is 45mm or less or 20mm or less, the back and the hip of the child are considerably depressed toward the backrest portion 32, and thus the impact can be absorbed by the back and the hip of the child.

(operation of buffer Structure)

The operation of the cushion structure 4 when a child is seated in the child seat 1 will be described with reference to fig. 4(a) to (B) and fig. 5(a) to (B). Fig. 4(a), fig. 5(a) show before impact, fig. 4(B), and fig. 5(B) show after impact.

When a child under one year of age is seated in the child seat 1, the cushion structure 4 is attached to the corner portion of the child seat 1 as shown in fig. 4 (a). By attaching the cushion structure 4, the child seat 1 is in a bed surface state, specifically, the angle θ 1 of the support surface 41 is, for example, 15 ° with respect to the horizontal plane. A child is seated on the support surface 41 of the cushion structure 4, and the waist belt 33, the shoulder belt 34, and the buckle 35 are connected by the buckle 36. Accordingly, the child can lie on the support surface 41 of the child seat 1 with the child facing upward.

In this state, if a large impact is applied to the child seated in the child seat 1 from the front of the vehicle due to sudden braking, an accident, or the like, the cushion structure 4 is pushed and displaced into the chair state as shown in fig. 4 (B). Specifically, when a load of 10k or more is applied to a child, the thickness of the cushion structure 4 is 45mm or less, for example, and the angle θ 3 of the support surface 41 is 35 ° to 45 ° with respect to the horizontal plane, for example. Specifically, as shown in fig. 5(B), first, a load of 10kg or more is applied to the back and hip of the child from the front, then the impact absorbing buffer 40 is pressed toward the backrest 32 and the seat 31, and the seat contact surface 54 and the backrest contact surface 55 of the housing 50 are pressed toward the backrest 32 and the seat 31. As described above, when a load is applied to a child, the cushion structure 4 is gradually pressed, and thus the impact can be absorbed by the hip or back of the child.

Conventionally, when a child under one year of age is seated in a child seat, the back rest of the child seat is tilted backward (the angle between the sitting portion and the back rest is increased) to set a bed surface state, and a shoulder harness or the like is worn on the child. In such a child seat, when an impact from the front is applied due to an accident of the vehicle, an emergency brake, or the like, the child moves forward due to a reaction force thereof, and therefore, the impact is generally absorbed by the shoulder belt in order to suppress the movement of the child. In this case, if the shoulder straps are not securely connected, the child may be thrown away when an impact is applied, which may cause a safety problem, and even if the shoulder straps are securely connected, the impact may be concentrated on the shoulders of the child, which may cause a heavy burden on the child.

In contrast, the child car seat 1 according to the present embodiment is in the bed surface state (fig. 4 a) in a state where no impact is applied, and the cushion structure 4 is compressed and deformed to be displaced to the chair state (fig. 4B) when an impact is applied. Accordingly, the impact on the child is received by the entire back portion, and the impact is dispersed to the back portion and the hip portion of the child, and the impact can be absorbed by the cushion structure 4 while being alleviated.

Further, since the cushion structure 4 is detachably attached to the corner portion of the child seat 1, when a child under one year of age is seated, the cushion structure 4 is attached to the child seat 1, whereby the child seat can be set to the bed surface state, and when a child of about three months to about twenty-four months old is seated, the cushion structure 4 can be detached from the child seat 1, and the child seat can be set to the chair state. Therefore, even in a child seat in which the angle between the seat portion 31 and the backrest portion 32 is fixed, the shape and angle of the seat surface can be changed by attaching or not attaching the cushion structure 4, and therefore, it is possible to match the growth of the child with a simple configuration.

Further, since the impact absorption buffer 40 uses a plurality of or more types of buffer materials for the first and

second buffer members

40A and 40B, the shape and hardness of the buffer materials can be easily set to a desired hardness by changing and combining the shapes and hardnesses.

The shock absorbing structure 4 of the present embodiment includes the shock absorbing and cushioning body 40 and the outer shell 50, but may include at least only the shock absorbing and cushioning body 40. In this case, since the impact absorption buffer body 40 abuts against the seat portion 31 and the backrest portion 32, the first bottom surface 43 becomes a backrest abutment surface, and the second bottom surface 44 becomes a seat portion abutment surface.

In the present embodiment, the first and

second cushion bodies

40A and 40B have the same shape and different hardness, but may have the same hardness and different shapes. For example, the first and

second buffer bodies

40A and 40B may have different thicknesses, or a concave portion or a convex portion may be provided on the bottom surfaces of the first and

second buffer bodies

40A and 40B. In addition, the first and

second buffer members

40A,40B may have different shapes and different hardness.

In the first embodiment, the two

cushion bodies

40A and 40B are linearly arranged with respect to the front-rear direction and are stacked in the left-right direction, but may be stacked in the up-down direction, the oblique direction, or the like. In addition, the first and

second buffer members

40A and 40B may be: for example, the first cushion body is provided with through holes extending in a direction perpendicular to the support surface, and the second cushion body is inserted into the through holes.

In the present embodiment, two types of cushioning materials of the first and

second cushioning bodies

40A,40B are provided, but a plurality of cushioning materials may be provided.

In addition, although the child car seat 1 including the cushion structure 4 is described in the above embodiment, only the cushion structure 4 may be provided singly. In this case, the cushion structure 4 of the present embodiment may be additionally mounted to a conventional child seat. In this case, not only the child seat but also the cushion structure 4 can be detachably attached to a child care implement for a child such as a stroller, a baby cradle, or a child care chair.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the embodiments of the drawings. Various modifications and variations may be made to the embodiments of the drawings within the same scope as or within an equivalent scope to the present invention.

Claims

1. A child seat is provided with:

a seat body having a seat portion and a backrest portion; and

a cushion structure including a support surface for supporting the back and hip of a child lying on his back from below, the cushion structure being detachably attached to a corner portion formed by the seat portion and the backrest portion;

the shock absorbing structure includes a shock absorbing cushion body having a first cushion body extending in a direction orthogonal to the support surface and a second cushion body extending in the same direction as the first cushion body and having a different cushioning property from the first cushion body.

2. The child seat according to claim 1, wherein the first and second cushion bodies extend linearly in the front-rear direction.

3. The child seat according to claim 1 or 2, wherein at least one of the hardness and the shape of the first and second cushioning bodies is different.

4. The child seat according to claim 1 or 2, wherein the first and second cushion bodies are triangular in longitudinal section.

5. The child seat according to claim 1, wherein the shock-absorbing structure further comprises a shell that surrounds a face of the shock-absorbing cushion body other than the support surface.

6. A child seat is provided with:

a seat body having a seat portion and a backrest portion; and

a cushion structure detachably attached to a corner portion formed by the seat portion and the backrest portion;

the buffer structure can take a first state and a second state,

the first aspect is to support the back and hip of a child lying on the back upward from below at an approximately horizontal angle during ordinary use,

in the second aspect, when a load for abruptly moving the child is applied to the backrest portion, the load is received by deforming flatly along the backrest portion.

7. The child seat according to claim 6, wherein the cushion structure includes a support surface that supports the back and the hip of the child lying on the back upward from below at an approximately horizontal angle;

in the first aspect, the thickness from the intersection point of the backrest portion and the seat portion to the support surface is 70mm or more.

8. The child seat according to claim 7, wherein the load is 10kg or more;

in the second aspect, a thickness from an intersection point of the backrest portion and the seat portion to the support surface is 45mm or less.

9. A child seat according to claim 7 or 8, wherein the angle of the support surface is 20 ° or less relative to the horizontal.

10. The child seat according to claim 7, wherein the cushion structure includes an impact absorbing cushion body having the support surface; and a case surrounding a surface other than the support surface in the shock absorbing and cushioning body.

11. The child seat according to claim 5 or 10, wherein the shell has a higher hardness than the impact absorption buffer body.

12. The child seat according to claim 10, further comprising:

a waist belt that restrains a waist of a child seated on the seat body; and

a stopper belt for restraining the crotch of a child seated on the seat body;

the shell is provided with a pair of waistband guide grooves, and the waistband penetrates through the side surface of the shell; and a band guide groove through which the band passes on the front surface of the housing.

13. A cushion structure is detachably mounted at a corner portion formed by a seat portion and a backrest portion of a child seat; wherein the content of the first and second substances,

the cushion structure body is provided with a seat abutting surface abutting against the seat; a backrest contact surface that is in contact with the backrest part; and a support surface for supporting the back and hip of the child lying on the back upward from below by the flat surface;

the buffer structure can take a first state and a second state,

the first mode is that when in normal use, the back and the hip of a child lying on the back are supported from the lower part at an approximately horizontal angle; and