JP2015202720A - Cushion for child seat of bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushion which is not interfered with a seat belt of a child seat of a bicycle and can be easily mounted.SOLUTION: A cushion 10 comprises a seating face loading part 11 and a back face part 12. In the seating face loading part 11 and the back face part 12, a tabular core material having flexibility which is disposed on a back fabric side and a cushion material which is disposed on a front fabric side between respective front fabrics 11f, 12f and back fabrics 11r, 12r of the parts 11, 12 are mounted. The seating face loading part 11 and the back face part 12 are so formed as to be capable of being folded at a boundary line part 13 therebetween. By such structure of the seating face loading part 11 and the back face part 12, when the seating face loading part 11 and the back face part 12 are folded at the boundary line part 13 in a direction such that surfaces of both are joined with each other, the seating face loading part 11 and the back face part 12 act in a direction such that the surfaces of both are separated from each other. Notches 15, 15 are provided on both end portions of the boundary line part 13, and a seat belt, which is provided on a child seat, can be inserted through these notches 15, 15.

Description

  The present invention relates to a cushion used by being mounted on and mounted on a seat surface and a backrest surface of a child seat (infant auxiliary chair) attached to a handle portion or a rear cargo bed of a bicycle.

  Conventionally, there are two types of child seats that can be attached to the bicycle: a type that is fixed to the rear seat and a type that is fixed to the handle. There is also a child seat pre-installed on the curved shape portion.

Examples of such child seat cushions include those described in the following patent documents.
This cushion can protect the user's knee back or thigh back, has a size that is substantially the same as or slightly smaller than the seat surface of the child seat, and when this is placed on the seat surface of the child seat A bulging portion is formed on both sides of the front end.

This bulge fits with the infant's knee or thigh back sitting on the child seat.
The cushion has a substantially heart shape, and the cushion is filled with a low-resilience urethane foam, and both ends of the cushion are sewn to both ends of an elastic member to be attached to the child seat. Thereby, since the elastic member can be disposed on either the back surface side or the front surface side, both the front side and the back side can be disposed on the top surface side. Further, two string members for mounting are provided at appropriate positions on the side edge of the cushion.

Utility Model Registration No. 3111097

  By the way, at present, very large and deluxe child seats have been developed, and the rear child seat to be attached to the rear cargo bed is made of a synthetic resin having a form that envelops the infant's body. There are those provided with a headrest whose height can be adjusted up and down.

Such a child seat with a deluxe equipment is also equipped with a seat belt for holding the infant's body. Conventionally, the seat belt was also of a three-point support type, but now it is 2011. The three- to five-point support type has been standardized according to the revised SG standards of the year, and the seat belt disposed on the crotch portion of the seated infant is standard.
On the other hand, a seat belt is also provided in a front child seat that is attached in advance to a portion where the handle central portion is curved in a U-shape.

  Therefore, in the present invention, it is an object of the present invention to provide a cushion that can be easily placed on and adapted to any type of front or rear child seat equipped with these seat belts. The first problem is to provide a cushion that does not interfere with the seat belt, that is, does not interfere with the installation or handling of the seat belt.

In addition, it is necessary to provide a cushion that does not interfere with the seat belt as a matter of course, and can be easily mounted / equipped at the time of mounting / equipment, and can be either a front or rear child seat. It is also an object of the present invention to provide a device that can be suitably adapted to the above.
Moreover, it is also an object of the present invention to create a structure for exhibiting the above functions.
Of course, the problem of improving cushioning, which is the original function and action of the present invention, is also a basic problem.

  Furthermore, in the child seat, the main body is made of synthetic resin, and the cushioning material made of a rubber material is provided on the surface of the seat surface and the backrest surface. It is also an object of the present invention to consider compatibility with the back surface of the cushion according to the present invention that comes into close contact with the surface.

  In order to solve the above-mentioned problems, a first aspect of the present invention is a cushion that can be provided on a seat surface and a backrest surface of a child seat attached to a bicycle, and the cushion is mounted on the seat surface of the child seat. It consists of a surface placing part and a back part in contact with the backrest surface of the child seat, and the seat surface placing part and the back part have flexibility arranged on the lining side between the respective outer and lining materials. The plate-shaped core material and the cushion material arranged on the outer surface side are internally provided, and the seat surface mounting portion and the back surface portion are formed so as to be bendable at the boundary portion between the two, the seat surface Due to the above structure of the mounting portion and the back surface portion, when the surfaces of the seat surface mounting portion and the back surface portion are bent at the boundary line portion, the surfaces of the seat surface mounting portion and the back surface portion are separated from each other. Both ends of the boundary line Is a notch provided, the seat belt provided on the child seat on these cutouts are child seat cushion bicycle, characterized in that it inserted.

  According to a second aspect of the present invention, in the first aspect, the notch portions provided at both end portions of the boundary line portion are provided on either side of the seat surface mounting portion or the back surface portion. This is a bicycle child seat cushion.

  According to a third aspect of the present invention, in the first or second aspect of the invention described above, the seat surface placement portion and the outer surface of the back portion are made of a synthetic resin fabric having flexibility and stretchability. The back and back linings are made of a joint fabric of synthetic resin fabric and synthetic fiber fabric, and the synthetic resin fabric is placed on the inside and the synthetic fiber fabric is placed on the outside. In addition, the bicycle seat cushion according to the present invention is characterized in that the seat portion and the back surface portion are formed by high-frequency welding of the boundary line portion.

  According to a fourth aspect of the present invention, there is provided the bicycle according to any one of the first to third aspects, wherein the thickness of each of the seat surface placing portion and the back surface portion is in a range of about 20 mm to 32 mm. This is a child seat cushion.

  In the first aspect of the present invention, the seat surface mounting portion and the back surface portion are formed such that both of them can be bent at the boundary portion, and each of the seat surface mounting portion and the back surface portion is formed. Since the core material arranged on the lining side and the cushion material arranged on the outer material side are internally provided between the outer material and the lining material, the material has an appropriate thickness.

With this thickness, even if the surfaces of the seating surface placing portion and the back surface portion are bent in the boundary line portion, the surfaces of these both are hardly joined.
That is, the surfaces of both of these act in the direction of separating from each other due to the presence of the cushioning material and the core material incorporated inside when both surfaces are joined.

In other words, the seat surface placing portion and the back surface portion maintain and maintain a predetermined angle very well when the seat surface placing portion and the back surface portion are placed and equipped on the seat surface and the backrest surface of the child seat. It can be attached to.
That is, when the cushion according to the present invention is placed on and mounted on the child seat, the back portion does not fall down in the forward direction, that is, toward the seat placement portion.

Thereby, in this invention, when putting an infant on a child seat, since a back part does not fall forward, the effect that it is easy to put an infant arises.
That is, if the back part falls forward, it is possible to solve the problem that it is difficult to place the infant when the infant is seated.
In this way, the cushion according to the present invention can be mounted and mounted on the seat and backrest of the child seat easily and very easily on the child seat, and exhibits the effect that it is easy to put an infant on it. It becomes.

  Further, the cushion according to the present invention is provided with a notch at both end portions of the boundary line portion, and the child seat belt can be easily inserted into the notch, thereby interfering with the seat belt. Therefore, the seat belt can be easily led out to the front side, and there is no trouble in the installation and handling of the seat belt.

In the 2nd thing of this invention, the position of the notch part provided in the both ends of the boundary line part of a cushion was limited more.
That is, the cutout portion is provided on either the seat surface placing portion or the back surface portion.
The seat belt of the child seat is provided so as to extend from both shoulders and both waists of the infant.
For these waist seat belts that extend from both waists, both types of child seats of different manufacturers, such as those that extend from the back side of the seat surface, or those that extend from the base end of the back surface, etc. Things exist.
In order to facilitate adaptation to these different types, in the present invention, this notch is provided on either the seat surface placing part side or the back surface part side.

As a result, in the case where the notch portion is provided on the seat surface mounting portion side of the boundary line portion, it can correspond to the child seat seat belt provided on the seat surface side, while the rear surface of the boundary line portion. In the case where the cutout portion is provided on the part side, the child seat belt can be provided on the backrest side.
Furthermore, in the present invention, since the seat surface placing portion and the back surface portion can be used in the opposite manner, a notch portion is provided on either the seat surface placing portion or the back surface portion. If it is provided, both types of child seats can be handled.

In the 3rd thing of this invention, the material of each surface material and lining of a seat surface mounting part and a back surface part is limited.
That is, the outer surface of the seat surface mounting portion and the back surface portion is formed from a synthetic resin fabric such as PVC (polyvinyl chloride) or PPE (polyphenylene ether), while the lining of the seat surface mounting portion and the back surface portion is made of PVC or It is formed from a bonded fabric of a synthetic resin fabric such as PPE and a synthetic fiber fabric such as nylon or polyester, and the synthetic resin fabric is formed on the inside and the synthetic fiber fabric is disposed on the outside.
Thereby, the peripheral part and boundary line part of a surface material and a lining can be high-frequency-welded, and a seat surface mounting part and a back surface part can be formed easily.

In addition, since the outer surface of the lining is formed from a synthetic fiber fabric, no particular problem arises even if it is in close contact with the rubber cushion material provided on the surface of the child seat.
If this lining is formed of a synthetic resin material in the same manner as the outer surface, deterioration due to close contact with the rubber cushion material provided on the surface of the child seat also occurs, and the present invention can prevent this.

In the 4th thing of this invention, the thickness of a seat surface mounting part and the thickness of a back surface part are limited to the predetermined range.
Thereby, the cushioning property of the cushion according to the present invention is improved, good cushioning performance is maintained, and the surface of the seat surface mounting portion and the back surface portion is bent at the boundary portion in the direction of joining. Also, both surfaces are difficult to join.

  Thus, even if it is bent at the boundary line portion in the direction in which the surfaces of the seat surface mounting portion and the back surface portion are joined, it is difficult for the surfaces to be joined to each other, This is because the cushion material and the core material are internally provided, and it is considered that the cushioning properties on the front side and the back side are different due to the presence of the cushion material and the core material inside.

In the present invention, as described above, the seat surface mounting portion and the back surface portion are configured to be difficult to join to each other. However, when the cushion is not used, the cushion is folded in half and stored by a rubber band or the like. can do.
In this case, it is folded in two so as to join the lining side of the seating surface placing part and the back surface part, but this lining side is different from the outer side and is provided with a flexible plate-like core material. Therefore, unlike the surface side, the structure is relatively easy to fold.

BRIEF DESCRIPTION OF THE DRAWINGS The whole cushion which concerns on one Embodiment of this invention is shown, The (A) is a top view which shows the surface side, The (B) is a side view. The state which folded the cushion which concerns on the said embodiment, ie, the state mounted and equipped in a child seat, is shown, (A) is a perspective view, (B) is a side view. It is explanatory drawing of the state which equipped the cushion which concerns on the said embodiment in the child seat of the bicycle.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1: shows the whole cushion which concerns on one Embodiment of this invention, The (A) is a top view which shows the surface side, The (B) is a side view.

The cushion 10 according to the present embodiment includes a seat surface mounting portion 11 and a back surface portion 12 having a substantially rectangular shape in plan view, and is formed to be bendable at a boundary line portion 13 between them.
Notches 15 and 15 are provided on the back surface 12 side of both ends of the boundary line portion 13.
As will be described later, the notch 15 is provided for inserting a child seat waist seat belt attached to the rear loading platform or handle of the bicycle.

  The notch 15 can be provided on the side of the seating surface mounting portion 11 at both ends of the boundary line portion 13, or on both the seating surface mounting portion 11 and the back surface portion 12 at both ends of the boundary line portion 13. It can also be provided.

The internal structure of the seat surface mounting part 11 and the back surface part 12 is the same.
That is, although the internal structure is not shown, the peripheral portions of the outer surfaces 11f and 12f and the linings 11r and 12r are welded at high frequency, and the boundary line portion 13 between the seating surface mounting portion 11 and the back surface portion 12 is also subjected to high frequency welding. In the seat surface mounting portion 11 and the back surface portion 12, a core material made of a paper plate-like body having flexibility on the back surface side, and the core material and the outer surfaces 11f and 12f, And a cushioning material disposed between the two.

In the present embodiment, two types of cushion materials are used in an overlapping manner.
That is, a low resilience urethane foam of about 14 mm disposed on the surface side and a PE (polyethylene) foam of about 9 mm disposed between the low resilience urethane foam and the core material are overlapped and installed. .
Of course, it is also possible to use only one type of cushion material, for example, only low-resilience urethane foam.
As the core material, a paper board material having flexibility is used, but a flexible synthetic resin board material made of PVC can also be used.

The outer materials 11f and 12f use PVC (polyvinyl chloride), and the lining materials 11r and 12r use the same joining material of PVC and nylon fabric, and join the PVC fabric on the inside and the nylon fabric on the outside (back side surface). I am using something.
Thereby, the outer materials 11f and 12f and the lining materials 11r and 12r are conveniently welded at a high frequency.

  In the present embodiment, one continuous shape including the entire seating surface placing portion and the back surface portion is used as the outer surface, and similarly, the joint fabric of PVC and nylon fabric is used as the seating surface placing portion as the lining. A single continuous shape including the entire back surface is used, and the core material and cushion material are arranged on the seat surface mounting portion and the back surface, and the peripheral edge portion and the boundary line portion are high-frequency welded. It is easy to complete.

  In the present embodiment, the reason for using PVC and nylon bonded fabrics as the linings 11r and 12r is that, when manufactured using PVC as the lining, a rubber cushion material is provided on the seat surface of the child seat, This is because the deterioration of the back surface of the cushion material of the present invention due to contact with the rubber cushion material is taken into consideration.

  That is, when the back surface of the cushion according to the invention is formed of PVC, there remains a problem that the PVC material comes into contact with the rubber cushion material of the child seat to cause deterioration. In order to avoid this problem, in this embodiment, nylon fabric is arranged on the outer surface side of the linings 11r and 12r.

  Further, in the present embodiment, the outer surfaces 11f and 12f and the linings 11r and 12r are of substantially the same shape and the same size, and the core material and the cushion material are internally provided, and the peripheral edge and the boundary line. As shown in the side view of FIG. 1B, the portion 13 is formed by high-frequency welding, so that the thickness from the welded portion 14 to the surface F is slightly thicker than the thickness from the welded portion 14 to the back surface R. The

  The reason for this is that the outer material is made of PVC and has appropriate flexibility and stretchability, but the backing material is a joint fabric of PVC and nylon fabric, so the flexibility and stretchability is the outer material. Therefore, it is considered that the thickness from the welded portion to the front surface F is slightly thicker than the thickness from the rear surface R in the side view.

The thickness from the welded portion 14 to the surface F will be described with reference to FIG. 2B, but the boundary portion 13 is bent in the direction in which the surfaces of the back surface portion 12 or the seat surface mounting portion 11 are joined. However, it becomes difficult for both surfaces to join.
That is, even if the both surfaces are bent so as to contact each other, the seat surface placing portion 11 and the back surface portion 12 are repelled at the boundary line portion 13 due to the presence of the cushion material and the core material incorporated in the inside. It exerts an effective action.

As a result, the cushion according to the present invention can be very well adapted to the seat surface and the backrest surface of the child seat when the child seat is placed and mounted on the child seat.
That is, when the cushion according to the present invention is placed on the seat surface of the child seat, it is considered that the back surface portion 12 does not fall forward.
As a result, when the infant is seated, the rear portion does not fall forward and the effect of being easily placed is produced.

FIG. 2 shows a state in which the cushion according to the embodiment is bent, that is, a state in which the cushion is placed / equipped on a child seat, in which (A) is a perspective view and (B) is a side view.
When the cushion 10 according to the present invention is placed / equipped on a child seat, the state shown in FIG.
That is, the seat surface placing portion 11 and the back surface portion 12 are placed on the child seat at an appropriate angle, that is, at an angle slightly larger than 90 degrees and at an angle that matches the angle between the seat surface and the backrest surface of the child seat, It is equipped.

And the notch parts 15 and 15 are provided in the back surface part 12 side of the both ends of the boundary line part 13. FIG.
The child seat belt can be inserted through the cutout portion 15.

As is well understood from the side view of FIG. 2B, the back surface portion 12 of the cushion 10 according to the present invention is shown standing from its planar state, but the lower end portion 12s of the outer surface 12f of the back surface portion 12 is illustrated. However, it will be in the state which contact | abutted to the base end part 11s of the boundary line part 13 of the surface material 11f of the seat surface mounting part 11, and the back part 12 will be in the state which is hard to bend rightward from this state.
This is because the outer surfaces 11f and 12f are bulged from the welded portion 14.

  As described above, in the present invention, the structure of the seat surface mounting portion 11 and the back surface portion 12 has the outer surfaces 11 and 12 appropriately bulging on the surface side of the welded portion 14. This makes it difficult for the surfaces 11f and 12f to be bonded and adhered to each other, so that the state shown in FIG. 2B can be maintained.

Therefore, the cushion 10 according to the present invention is appropriately placed and equipped on the seat surface and the backrest surface of the child seat while maintaining the configuration of FIG.
In this embodiment, the thickness of the seat surface mounting part 11 and the back surface part 12 is set in the range between 20 mm and 32 mm, respectively.

In the cushion 10 according to the present embodiment, the thickness from the welded portion 14 to the outer fabrics 11f and 12f is slightly thicker than the thickness from the welded portion 14 to the linings 11r and 12r.
Since the thickness up to the linings 11r and 12r is slightly reduced in this way, the linings 11r and 12r side is somewhat easily joined when the cushion 10 is folded at the boundary portion 13 to be folded in half. is there.

This is because the cushion 10 folded in half on the back side can be folded and stored in a small size by being bound with a rubber band or the like.
Of course, it is natural that the thickness from the welded portion 14 to the outer surfaces 11f and 12f and the thickness from the welded portion 14 to the linings 11r and 12r may be the same.

FIG. 3 is an explanatory view showing a state in which the cushion according to the embodiment is mounted on a child seat of a bicycle.
The child seat 30 shown in this figure is attached to the rear loading platform of the bicycle, and the seat 31 in the center is made of a hard synthetic resin and has a size that can accommodate the waist of an infant to be used. And it is formed from a seat surface, a backrest surface, and both sides.

A handle portion 32 is provided in front of the seat portion 31, a footrest portion 33 extending downward from both front portions of the seat portion 31 is provided, and an upper center portion of the backrest surface of the seat portion 31 is provided. The headrest 35 is provided so as to be slidable up and down.
Lumbar seat belts 36 and 36 are provided at the boundary between the seating surface and the backrest surface of the seat portion 31, and shoulder seatbelts 37 and 37 are provided from the upper end portion of the backrest surface. A five-point supported seat belt is provided which is connected to each other by a buckle 39 provided at the end of the crotch holding portion 38 extending upward from the front (the front end portion is shown from the middle portion of the seat belts 36 and 37) Omitted.)

  The cushion 10 according to the present invention is mounted and mounted on the seat portion 31 as shown in the figure. At this time, the waist seat belts 36 and 36 are provided on both sides of the lower end of the back surface portion 12 of the cushion 10. The cutout portions 15 and 15 (the left one is not shown in the figure) can be inserted and led to the front side.

At this time, when the lumbar seat belts 36, 36 are on the back side of the seat portion 31, the back portion 12 of the cushion 10 is arranged and installed on the backrest side of the seat portion 31 as shown.
On the other hand, when the seat belts 36 and 36 are on the seat surface side of the seat portion 31, the back surface portion 12 provided with the notches 15 and 15 is disposed on the seat surface side of the seat portion 31, that is, the reverse It is placed and equipped.

  In the state of FIG. 3, the cushion 10 has a boundary line portion 13 in which the outer surface 11 f and the outer surface 12 f are in contact with each other, and the seat surface placing portion 11 and the back surface portion 12 are in a planar state, that is, mutually. The seating surface mounting part 11 has a backrest surface and a crotch part of the seat part 31 because the seating surface mounting part 11 acts in a direction in which the surfaces of the seating surface mounting part 11 and the back surface part 12 are separated from each other. Since it fits between the holding part 38, the cushion 10 which concerns on this invention is equipped and mounted | worn on the seat part 31 of a child seat very favorably.

  In addition, rubber cushioning material is provided on the seating surface and the backrest surface of the seat portion 31. However, because the lining of the cushion 10 is formed of nylon as described above, the back surface of the cushion 10 is The possibility of deterioration can also be prevented.

As mentioned above, although embodiment of this invention was described, various design changes are possible as follows.
The cushion according to the present invention comprises a seat surface mounting portion and a back surface portion, and is formed so as to be foldable at the boundary line portion between them, and the thickness of the seat surface mounting portion and the back surface portion is appropriately increased. It is a thing.
The planar view shapes of the seat surface mounting portion and the back surface portion can be designed as appropriate, but may be formed so as to match the shape of the seat surface of the child seat.

In the said embodiment, although the said boundary line part and the peripheral edge part of an outer periphery are formed by carrying out the high frequency welding of the said part of a surface material and a lining, it can change freely also regarding the manufacturing method.
PVC is used as the material for the outer material, but other materials such as PVC and nylon fabric, PVC and polyester fabric, PPE (polyphenylene ether) and nylon fabric, etc. should be used. Can do.

In short, it is optimal to use a synthetic resin fabric having flexibility and stretchability as the outer material, or a bonded fabric between the synthetic resin fabric and the synthetic fiber fabric may be used. .
When using a joint fabric with a synthetic fiber fabric, it is desirable to use a fabric having higher flexibility and stretchability than the lining.

On the other hand, as the lining in the above embodiment, a bonded fabric of PVC and nylon fabric is used. However, in addition to this, a bonded fabric of PVC and polyester fabric, a bonded fabric of PPE and nylon fabric, only PVC, etc. Can also be used.
That is, it is optimal to use a bonded fabric of a synthetic resin fabric and a synthetic fiber fabric and to arrange and form the synthetic fiber fabric on the outer back side.

The material of the core material and the material of the cushion material arranged inside can also be selected and used as necessary, and as in the above embodiment, two types of cushion materials with different repulsive forces are overlapped for interior decoration. Alternatively, the thickness can be set freely.
The core material may be a plate-shaped material having flexibility, and a material made of paper or synthetic resin can be used as the material.

In the cushion according to the present invention, the seat surface mounting portion and the back surface portion have basically the same shape, and are formed by providing notches at both ends of the boundary line portion on one side. The seat surface mounting portion and the back surface portion are given names for the sake of convenience, but they are the same even if they are provided oppositely.
That is, the seat surface placing portion can be placed on the backrest surface of the child seat and the back surface portion can be placed on the seat surface of the child seat.

  As described above, in the present invention, notches can be provided at both ends of the boundary line portion of the cushion so that various types of child seat belts can be inserted, and the child seat can be placed and equipped very easily and satisfactorily. It was possible to provide a cushion whose rear part would not fall forward.

DESCRIPTION OF SYMBOLS 10 Cushion 11 Seat surface mounting part 12 Back part 11f, 12f Outer material 11r, 12r Lining 13 Boundary part 14 Welding part 15 Notch part 30 Child seat 31 Seat part 32 Handle part 33 Footrest part 35 Headrest 36 Lumbar seat belt 37 Shoulder part Seat belt 38 Crotch part holding part 39 Buckle F Front surface R Rear surface

Claims (4)

In the cushion that can be equipped on the seat and backrest of the child seat attached to the bicycle,
This cushion (10) is composed of a seat surface placing portion (11) placed on the seat surface of the child seat and a back surface portion (12) in contact with the backrest surface of the child seat,
The seating surface placing portion (11) and the back surface portion (12) are arranged on the lining (11r, 12r) side between the outer surface (11f, 12f) and the lining (11r, 12r). The plate-shaped core material having the properties and the cushioning material arranged on the outer surface (11f, 12f) side are equipped,
These seating surface placing portion (11) and back surface portion (12) are formed to be bendable at the boundary line portion (13) between them,
With the above structure of the seating surface placing part (11) and the back surface part (12), the direction of joining the surfaces of the seating surface placing part (11) and the back surface part (12) at the boundary line part (13) When bent to act on the direction in which the surfaces of the seat surface mounting portion (11) and the back surface portion (12) are separated from each other,
Provided with notches (15, 15) at both ends of the boundary portion (13),
A bicycle seat cushion for a bicycle, wherein a seat belt provided on a child seat can be inserted into the notches (15, 15).   The notch portions (15, 15) provided at both ends of the boundary line portion (13) are provided on either side of the seat surface placing portion (11) or the back surface portion (12). The bicycle child seat cushion according to claim 1. The outer surface (11f, 12f) of the seat surface placing portion (11) and the back surface portion (12) is made of a synthetic resin fabric having flexibility and stretchability,
The lining (11r, 12r) of the seat surface placing portion (11) and the back surface portion (12) is made of a joined fabric of a synthetic resin fabric and a synthetic fiber fabric, and the synthetic resin fabric is on the inner side. Consists of things arranged on the outside,
The peripheral part and boundary part (13) of the outer material (11f, 12f) and the lining (11r, 12r) are high frequency welded to form the seat surface mounting part (11) and the back part (12). The bicycle child seat cushion according to claim 1 or 2.   4. The bicycle child seat according to claim 1, wherein a thickness of each of the seat surface placing portion (11) and the back surface portion (12) is in a range of about 20 mm to 32 mm. cushion.