child seat

Abstract

To provide a child seat and cushion structure that can accommodate a growth of a child and can absorb shock with a simple structure.SOLUTION: A child seat includes: a seat body with a seat part and a backrest part; and a cushion structure (4) that includes a support surface (41) supporting the back and hip of a child lying on his back from below, and that can be detachably attached to a corner part formed by the seat part and the backrest part. The cushion structure (4) has: a first cushion body (40A) extending in a direction perpendicular to the support surface; and a second cushion body (40B) that extends in a same direction as the first cushion body and has a different cushioning property from the first cushion body.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This invention relates to a child seat and a cushion structure.

Background Art

[0002] Generally, when placing a child under 1 year old who cannot sit upright on a child seat, the child is laid in a state close to lying on the back, held backward with respect to the traveling direction of the vehicle, and fixed to the child seat with a belt. In such a state, when receiving an impact from the front due to an accident or sudden braking, the child moves forward due to the reaction, so in an attempt to suppress the movement, the impact concentrates on the shoulder portion of the child via the shoulder belt.

[0003] Moreover, as child seats provided with a structure capable of mitigating an impact from the front, for example, there are JP-A-2009-161010 (Patent Document 1), JP-A-2003-63291 (Patent Document 2), JP-A-2004-217038 (Patent Document 3), and JP-A-2008-184133 (Patent Document 4).

[0004] Patent Document 1 discloses absorbing an impact with an angle changing portion that deforms in a direction of reducing the backrest angle. Patent Documents 2 and 3 disclose that when an impact is applied, the back surface portion rotates in a direction of rising, and absorbing the impact with an impact absorbing member. Patent Document 4 discloses that when an impact is applied, a rod connected to a link arm moves along with the rotation of the link arm.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] The corner modification section in Patent Document 1 is fixed to the child seat and therefore does not accommodate the child's growth. Furthermore, the child seats in Patent Documents 2 to 4 have a complex structure because they use multiple components to absorb impact.

[0007] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a child seat and cushion structure that can accommodate a child's growth and absorb impact with a simple structure. [Means for solving the problem]

[0008] A child seat according to one aspect of the present invention comprises a seat body having a seat portion and a backrest portion, and a cushion structure that includes a support surface for supporting the back and buttocks of a child lying on their back from below, and is detachably attached to the corner portion formed by the seat portion and the backrest portion, wherein the cushion structure is relative to the support surface orthogonal The shock-absorbing cushion includes a first cushion body extending in a certain direction, and a second cushion body extending in the same direction as the first cushion body and having different cushioning properties than the first cushion body.

[0009] Preferably, the first cushion body and the second cushion body extend linearly in the front-to-back direction.

[0010] Preferably, the first cushion and the second cushion differ in at least one of their hardness and shape.

[0011] Preferably, the first cushion body and the second cushion body are triangular in their longitudinal cross-sectional view.

[0012] Preferably, the cushion structure further includes a housing that surrounds the surfaces of the shock-absorbing cushion body other than the support surface.

[0013] A child seat according to one aspect of the present invention comprises a seat body having a seat portion and a backrest portion, and a cushion structure that is detachably attached to the corner portion formed by the seat portion and the backrest portion, wherein the cushion structure can take two forms: a first form in which, during normal use, it supports the back and buttocks of a child lying on their back from below at a nearly horizontal angle, and a second form in which, when a load is applied that rapidly moves the child toward the backrest portion, it deforms to become flat along the backrest portion to receive that load.

[0014] Preferably, the cushion structure includes a support surface that supports the back and buttocks of a child lying on their back from below at a nearly horizontal angle, and in the first embodiment, the thickness from the intersection of the backrest and the seat to the support surface is 70 mm or more.

[0015] Preferably, the load is 10 kg or more, and in the second form, the thickness from the intersection of the backrest and the seat to the support surface is 45 mm or less.

[0016] Preferably, the angle of the support surface is 20° or less with respect to the horizontal plane.

[0017] Preferably, the cushion structure includes an impact-absorbing cushion body having a support surface, and a housing that surrounds the surfaces of the impact-absorbing cushion body other than the support surface.

[0018] Preferably, the housing has a higher hardness than the shock-absorbing cushioning body.

[0019] Preferably, the seat further comprises a waist belt for restraining the waist of a child seated on the seat body and a crotch belt for restraining the crotch of a child seated on the seat body, and the housing has a pair of waist belt guide grooves on its side through which the waist belt passes, and a crotch belt guide groove on its front surface through which the crotch belt passes.

[0020] A cushion structure according to one aspect of the present invention is a cushion structure detachably attached to a corner portion formed by a seat portion and a backrest portion of a child seat. The cushion structure includes a seat contact surface that contacts the seat portion, a backrest contact surface that contacts the backrest portion, and a support surface that supports the back and buttocks of a child lying face up from below with a flat surface. In normal use, the cushion structure can take a first form in which it supports the back and buttocks of a child lying face up from below at an angle close to horizontal, and a second form in which it deforms flat along the backrest portion to receive the load when a load that suddenly moves the child towards the backrest portion is applied.

Advantages of the Invention

[0021] The child seat and cushion structure of the present invention can accommodate the growth of a child and can absorb impacts with a simple structure.

Brief Description of the Drawings

[0022] [Figure 1] It is a figure which shows the child seat which concerns on this Embodiment, (A) shows the state which attached the cushion structure and turned backward, (B) shows the state which removed the cushion structure and turned backward, (C) shows the forward state. [Figure 2] It is a perspective view of the cushion structure which concerns on this Embodiment. [Figure 3] It is an exploded perspective view of the cushion structure which concerns on this Embodiment, (A) shows a housing, (B) shows a shock-absorbing cushion body, (C) shows the 1st and 2nd cushion bodies respectively. [Figure 4] It is a figure which shows the state which attached the cushion structure and turned backward, (A) shows the state where no impact is applied, (B) shows the state where an impact is applied. [Figure 5] (A) is an enlarged view of FIG. 4(A), and (B) is an enlarged view of FIG. 4(B).

Modes for Carrying Out the Invention

[0023] Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and their descriptions will not be repeated.

[0024] (About child car seats) Referring to Figure 1, an embodiment of the present invention, a child seat 1 will be described. 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 viewing the seat of the child seat 1 from the front.

[0025] The child seat 1 according to this embodiment is a device that is placed on the seat of a vehicle and is used to safely carry children such as infants and toddlers. The child seat 1 comprises a base body 2 and a seat body 3. The base body 2 is placed on the seat of the vehicle. The base body 2 comprises a vertical portion that abuts against the backrest of the seat and a horizontal portion that abuts against the seat of the vehicle. The seat body 3 is attached to the upper side of the base body 2 and is rotatably supported relative to the base body 2. The seat body 3 is fixed in at least a rearward-facing and a forward-facing position.

[0026] A child sits in the seat body 3. Therefore, the seat body 3 has a seat portion 31 that supports the child's buttocks, and a backrest portion 32 that rises from behind the seat portion 31 and supports the child's back. The angle between the seat portion 31 and the backrest portion 32 is fixed, for example, 80° to 100° relative to the seat portion 31. In other words, the backrest portion 32 cannot be tilted forward or backward. Furthermore, the seat portion 31 and the backrest portion 32 are each detachably fitted with covering members. These covering members are made of soft fabric materials, such as cushioning material.

[0027] Between the seat portion 31 and the backrest portion 32, a waist belt 33 is provided to restrain the waist of a child seated on the seat body 3. The seat portion 31 is provided with a crotch belt 35 to restrain the crotch of a child seated on the seat body 3. The backrest portion 32 is provided with shoulder belts 34 to restrain the shoulders of a child seated on the seat body 3. These belts 33, 34, and 35 are connected near the child's abdomen by buckles 36 provided at the ends of these belts 33, 34, and 35. These belts 33, 34, and 35 are a so-called five-point harness. Furthermore, the waist belt 33 and the shoulder belts 34 do not necessarily have to be formed from separate belts; for example, they may be provided continuously as a single belt.

[0028] When placing a child under one year old in the child seat 1, as shown in Figure 1(A), the seat body 3 is turned backward relative to the base body 2, and the cushion structure 4 is attached to the corner formed by the seat portion 31 and the backrest portion 32. By attaching the cushion structure 4, the child seat 1 becomes a bed. The bed state is a state in which the child's back and buttocks are at an angle that is nearly horizontal.

[0029] When placing a child between 3 and 24 months old in child seat 1, remove the cushion structure 4 located in the corner while keeping the seat facing rearward, as shown in Figure 1(B). Removing the cushion structure 4 transforms child seat 1 into a chair. The chair state means that the child's back and buttocks are held at an angle. The bed state and chair state will be described later.

[0030] When placing a child between 15 months and 4 years old in the child seat 1, the cushion structure 4 is removed, as shown in Figure 1(C), and the seat body 3 is positioned facing forward relative to the base body 2. The seat body 3 is angled forward relative to the base body 2. As a result, the child seat 1 becomes a chair-like position where the child's back and buttocks are held at a greater angle than in Figure 1(B).

[0031] As shown in Figure 1(A), the cushion structure 4 is used when a child under one year old is placed in the child seat 1. Next, the cushion structure 4 will be described.

[0032] (Regarding cushioning structures) Referring further to Figures 2-5, the cushion structure 4 is detachably attached to the corner formed by the seat portion 31 and the backrest portion 32. The cushion structure 4 comprises an impact-absorbing cushion body 40 and a housing 50 surrounding the impact-absorbing cushion body 40.

[0033] As shown in Figures 2, 3(B), and 3(C), the shock-absorbing cushion body 40 has flexibility, resilience, and cushioning properties, and absorbs impact from the support surface 41, which will be described later. The shock-absorbing cushion body 40 is, for example, roughly triangular prism-shaped, and is formed in a triangular shape in vertical cross-section. The shock-absorbing cushion body 40 is a foamed synthetic resin having open cells, and is formed from, for example, urethane.

[0034] As shown in Figure 3(B), the shock-absorbing cushion body 40 is positioned so that the longest side 45 of the pair of roughly triangular sides 42 is facing upwards, and the surface where the long side 45 forms part of the periphery (the surface with the largest area among the various surfaces) becomes the support surface 41. The support surface 41 is roughly rectangular in plan view. The support surface 41 slopes downwards toward the side where the child's feet are.

[0035] Each pair of sides 42 has a long side 45, a first short side 46, and a second short side 47, with the angle between the first short side 46 and the second short side 47 being, for example, 80° to 100°. The first bottom surface 43 and the second bottom surface 44, which form part of the periphery of the first short side 46 or the second short side 47, are positioned to face the housing 50.

[0036] As shown in Figure 1(A), when the child seat 1 is facing backward and the cushion structure 4 is attached to the corner of the child seat 1, the support surface 41 supports the back and buttocks of a child lying on their back from below at a nearly horizontal angle. In other words, the support surface 41 is the part that supports the child's back and buttocks. In this case, the angle θ1 of the support surface 41 is 20° or less with respect to the horizontal plane, preferably 15° or less. If it exceeds 20°, the angle of the child's back and buttocks will be too great, which is undesirable for children under one year old whose necks are not yet strong enough to support their heads. Also, if it is 15° or less, the child's back and legs can be held in a more horizontal position. Thus, the bed state is a state in which the child's back and buttocks are supported at a nearly horizontal angle, and specifically, the angle θ1 of the support surface 41 is 20° or less with respect to the horizontal plane.

[0037] As shown in Figure 1(B), when the child seat is facing backward and the cushion structure 4 is removed from the corner of the child seat 1, the covering members of the seat 31 and backrest 32 of the child seat 1 come into contact with the child's back and buttocks. In this case, the angle θ2 between the seat 31 and backrest 32 of the child seat 1 is between 30° and 80° with respect to the horizontal plane. If it is less than 30°, it is too close to a bed position, and if it exceeds 80°, the angle between the child's back and buttocks is too great, which is undesirable for children between 3 months and 24 months of age. Thus, the chair position is when the angle θ2 between the seat 31 and backrest 32 is between 30° and 80° with respect to the horizontal plane.

[0038] As shown in Figures 3(B) and 3(C), the shock-absorbing cushion body 40 is formed by laminating a plurality of first cushion bodies 40A and a plurality of second cushion bodies 40B. The first cushion bodies 40A and the second cushion bodies 40B have different cushioning properties. Different cushioning properties mean that at least one of the hardness and shape is different. In this embodiment, the first and second cushion bodies 40A and 40B have different hardnesses, with the hardness of the first cushion body 40A being set higher than that of the second cushion body 40B.

[0039] As shown in Figure 3(C), the first cushion body 40A and the second cushion body 40B have substantially the same shape and are substantially triangular prisms. The first and second cushion bodies 40A and 40B are relative to the support surface 41. orthogonal They extend in that direction. Specifically, the first and second cushions 40A and 40B extend linearly in the front-to-back direction (the direction in which a child's body extends). In other words, the first cushion 40A and the second cushion 40B are stacked in the left-to-right direction.

[0040] The first and second cushions 40A and 40B may be arranged alternately, or for example, the first cushion 40A, which has lower hardness, may be placed in the center in the left-right direction, and the second cushions 40B, which have higher hardness, may be placed on either side of it. In this way, since the first and second cushions 40A and 40B have the same shape and are stacked in the left-right direction, the first and second cushions 40A and 40B can be easily swapped, and the overall hardness of the shock-absorbing cushion 40 can be optimized. It is preferable that the first and second cushions 40A and 40B are not fixed with adhesive or the like from the viewpoint of hardness setting.

[0041] As shown in Figure 3(A), the housing 50 surrounds the surfaces of the shock-absorbing cushion body 40 other than the support surface 41. The housing 50 contacts the seat portion 31 and the backrest portion 32. The housing 50 is made of, for example, synthetic resin, and is typically urethane. The housing 50 is set to have a higher hardness than the shock-absorbing cushion body 40.

[0042] The housing 50 includes a top surface 51, a pair of side surfaces 52, and a bottom surface 53. As shown in Figure 5, the bottom surface 53 has a seat contact surface 54 that abuts against the seat portion 31 and a backrest contact surface 55 that abuts against the backrest portion 32. A recess 56 is formed approximately in the center of the top surface 51. The thickness of the seat contact surface 54 and the backrest contact surface 55 is preferably 10 mm or more and 25 mm or less, and the thickness at the intersection where the seat contact surface 54 and the backrest contact surface 55 meet is typically 25 mm.

[0043] As shown in Figure 3(A), the recess 56 includes a first bottom surface 56a, a second bottom surface 56b, and a pair of side surfaces 56c. The shock-absorbing cushion body 40 is placed in the recess 56. Therefore, the first bottom surface 43 of the shock-absorbing cushion body 40 abuts against the first bottom surface 56a of the recess 56, the second bottom surface 44 of the shock-absorbing cushion body 40 abuts against the second bottom surface 56b, and the pair of side surfaces 56c abut each of the pair of side surfaces 42. In this way, all four sides of the shock-absorbing cushion body 40, excluding the support surface 41, are in close contact with the recess 56. The surfaces 56a, 56b, and 56c of the recess and the shock-absorbing cushion body 40 do not necessarily need to be fixed with adhesive or the like.

[0044] Furthermore, the housing 50 is formed with a pair of waist belt guide grooves 57 through which the waist belt 33 passes, and a crotch belt guide groove 58 on its front surface through which the crotch belt passes. The waist belt guide grooves 57 are formed by cutting out a pair of side surfaces 52 from the top surface 51 toward the bottom surface 53. The crotch belt guide grooves 58 are formed by cutting out a section from the top surface 51 toward the seat contact surface 54.

[0045] The cushion structure 4 is in its first form (Figure 4(A), Figure 5(A)) during normal use, and can take on its second form (Figure 4(B), Figure 5(B)) when a load (impact load) is applied that causes the child to move rapidly towards the backrest 32.

[0046] As shown in Figure 4(A), when the cushion structure 4 is in its first form, the cushion structure 4 supports the back and buttocks of a child under one year old lying on their back from below at a nearly horizontal angle. In other words, during normal use, the shock-absorbing cushion body 40 and housing 50 remain almost uncompressed, maintaining a bed-like state where the angle θ1 of the support surface 41 is 20° or less with respect to the horizontal plane.

[0047] As shown in Figure 5(A), the thickness T1 of the cushion structure 4 is, for example, 70 mm or more, and preferably 90 mm or more. Here, thickness T1 refers to the distance from the intersection A1 where the seat contact surface 54 and the backrest contact surface 55 intersect to the intersection A2 of the line extending vertically from intersection A1 and the support surface 41. The same applies to thickness T2 shown below. If the thickness T1 is 70 mm or more, the corners can be filled, and the child's back and buttocks can be supported at a nearly horizontal angle. Furthermore, if the thickness T1 is 90 mm or more, even as the child grows, the child will not feel cramped, and the child's back and buttocks can be supported at a nearly horizontal angle. The thickness of the housing 50 connecting intersections A1 and A2 is typically 25 mm.

[0048] As shown in Figures 4(B) and 5(B), when the cushion structure 4 is in the second form, the cushion structure 4 collapses to receive the load and deforms flat along the backrest 32. Specifically, when a load of 10 kg or more is applied that causes a child to move rapidly towards the backrest 32, the cushion structure 4 becomes a chair-like state where the angle θ3 of the support surface 41 is between 35° and 45° with respect to the horizontal plane. In this way, the cushion is set to change from a bed state to a chair state when a load of 10 kg or more is applied to the child. The load that causes a child to move rapidly as described above is, for example, an impact from the front such as a frontal collision or sudden braking by a vehicle. Furthermore, "flat" means that at least the backrest 32 has an elongated shape vertically along the backrest 32, and also includes cases where the part along the seat 31 is elongated front to back.

[0049] When a load of 10 kg or more is applied, as shown in Figure 5(B), the thickness T2 from the intersection A1 where the seat contact surface 54 and the backrest contact surface 55 meet to the intersection A2 of the support surface 41 is, for example, 45 mm or less, and preferably 20 mm or less. If it is 45 mm or less or 20 mm or less, the child's back and buttocks will be considerably recessed towards the backrest 32, so the impact can be absorbed by the child's back and buttocks.

[0050] (Regarding the operation of the cushioning structure) Referring to Figures 4 and 5, the operation of the cushion structure 4 when a child is placed in the child seat 1 will be explained. Figures 4(A) and 5(A) show the situation before impact, and Figures 4(B) and 5(B) show the situation after impact.

[0051] When placing a child under one year old in the child seat 1, the cushion structure 4 is attached to the corner of the child seat 1, as shown in Figure 4(A). By attaching the cushion structure 4, the child seat 1 becomes a bed-like state, specifically, the angle θ1 of the support surface 41 becomes, for example, 15° with respect to the horizontal plane. The child is placed on the support surface 41 of the cushion structure 4, and the waist belt 33, shoulder belts 34, and crotch belt 35 are connected with the buckle 36. This allows the child to lie face up on the support surface 41 of the child seat 1.

[0052] In this state, if a large impact occurs from the front of the vehicle to the child in the child seat 1 due to sudden braking or an accident, the cushion structure 4 collapses and displaces into a seat-like state, as shown in Figure 4(B). Specifically, when a load of 10 kg or more is applied to the child, the thickness T2 of the cushion structure 4 becomes, for example, 45 mm or less, and the angle θ3 of the support surface 41 becomes, for example, 35° to 45° with respect to the horizontal plane. Specifically, as shown in Figure 5(B), first a load of 10 g or more is applied to the child's back and buttocks from the front, then the impact-absorbing cushion body 40 collapses toward the backrest portion 32 and seat portion 54, and further, the seat contact surface 54 and backrest contact surface 55 of the housing 50 collapse toward the backrest portion 32 and seat portion 54. In this way, as a load is applied to the child, the cushion structure 4 collapses in stages, allowing the impact to be absorbed by the child's buttocks or back.

[0053] Traditionally, when placing a child under one year old in a child car seat, the backrest of the car seat is tilted backward (increasing the angle between the seat and backrest) to create a bed-like position, and shoulder belts are attached to the child. In such car seats, if the vehicle experiences an impact from the front, such as an accident or sudden braking, the child will move forward due to the recoil. It was common practice to absorb the impact with the shoulder belts to prevent this movement. However, if the shoulder belts are not securely fastened, the child could be thrown out in the event of an impact, posing a safety problem. Even if the shoulder belts are securely fastened, the impact is concentrated on the child's shoulders, placing a heavy burden on the child.

[0054] In contrast, the child seat 1 of this embodiment is in a bed state (Figure 4(A)) when no impact is applied, and when an impact is applied, the cushion structure 4 compresses and deforms, displacing it into a chair state (Figure 4(B)). As a result, the impact on the child is absorbed by the entire back, the impact is distributed to the child's back and buttocks, the impact is mitigated, and the impact can be absorbed by the cushion structure 4.

[0055] Furthermore, since the cushion structure 4 can be detachably attached to the corner of the child seat 1, when carrying a child under one year old, the cushion structure 4 can be attached to the child seat 1 to create a bed-like configuration, and when carrying a child between three and twenty-four months old, the cushion structure 4 can be removed from the child seat 1 to create a chair-like configuration. Therefore, even with a child seat where the angles of the seat 31 and backrest 32 are fixed, the shape and angle of the seat can be changed by attaching or detaching the cushion structure 4, allowing it to adapt to the child's growth with a simple structure.

[0056] Furthermore, since the shock-absorbing cushion body 40 uses multiple types of cushions, including the first and second cushion bodies 40A and 40B, the desired hardness can be easily achieved by changing and combining the shape or hardness of these cushions.

[0057] In this embodiment, the cushion structure 4 comprises an impact-absorbing cushion body 40 and a housing 50, but it is sufficient to have at least the impact-absorbing cushion body 40. In this case, since the impact-absorbing cushion body 40 contacts the seat portion 31 and the backrest portion 32, the first bottom surface 43 becomes the backrest contact surface and the second bottom surface 44 becomes the seat portion contact surface.

[0058] Furthermore, in this embodiment, the first and second cushions 40A and 40B have the same shape but different hardnesses. However, for example, they may have the same hardness but different shapes. For example, the first and second cushions 40A and 40B may have different thicknesses, or the bottom surfaces of the first and second cushions 40A and 40B may have recesses or protrusions. Also, the first and second cushions 40A and 40B may both have different shapes and hardnesses.

[0059] Furthermore, although the first and second cushion bodies 40A and 40B in this embodiment were arranged linearly in the front-to-back direction and stacked in the left-to-right direction, they may also be stacked in the up-and-down direction, diagonally, etc. Furthermore, the first and second cushion bodies 40A and 40B may, for example, have the first cushion body relative to the support surface. orthogonal The device may have dispersed through holes extending in a certain direction, and a second cushion body may be inserted into these through holes.

[0060] Furthermore, in this embodiment, two types of cushions, the first and second cushion bodies 40A and 40B, were provided, but multiple cushions may be provided.

[0061] Furthermore, although the above embodiment describes a child seat 1 equipped with a cushion structure 4, the cushion structure 4 may also be provided as a standalone component. In this case, the cushion structure 4 of this embodiment can be retrofitted to an existing child seat. In this case, the cushion structure 4 may be detachably attached not only to a child seat, but also to other childcare equipment such as a stroller, baby rack, or childcare chair.

[0062] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the equivalent scope. [Explanation of Symbols]

[0063] 1 Child seat, 2 Base body, 3 Seat body, 4 Cushion structure, 31 Seat, 32 Backrest, 33 Waist belt, 34 Shoulder belt, 35 Crotch belt, 40 Impact absorbing cushion body, 40A First cushion body, 40B Second cushion body, 41 Support surface, 50 Housing, 54 Seat contact surface, 55 Backrest contact surface, 57 Waist belt guide groove, 58 Crotch belt guide groove.

Claims

1. A seat body having a seat and a backrest, The cushion structure includes a support surface that supports the back and buttocks of a child lying on their back from below, a first bottom surface located on the seat side, a second bottom surface located on the backrest side, and side surfaces located in the left-right direction, and is detachably attached to the corner formed by the seat and the backrest. The cushion structure includes an impact-absorbing cushion body having a first cushion body having a first side surface extending in the front-rear direction with respect to the support surface, and a second cushion body having a second side surface extending in the same direction as the first cushion body and having different cushioning properties than the first cushion body. A child car seat in which the first cushion body and the second cushion body are stacked in the left-right direction with the first side surface and the second side surface surface in contact with each other.

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

3. The child seat according to claim 1 or 2, wherein the first cushion body and the second cushion body differ in at least one of their hardness and shape.

4. The child seat according to any one of claims 1 to 3, wherein the first cushion body and the second cushion body are triangular in cross-sectional view in the front-to-back direction.

5. The child seat according to any one of claims 1 to 4, wherein the cushion structure further includes a housing that surrounds the surface of the shock-absorbing cushion body other than the support surface.

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