JP2001206114A - Seat both for adult and for child - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight and a manufacture cost without impairing a cushion property of a seat for adult and child. SOLUTION: This seat both for an adult and a child is constituted by a seat cushion A and a seat back B for adult; and a belt attachment 40 for child attachably/detachably mounted to those. The belt attachment 40 for child is constituted by a protection pad 45 which has a two-opening buckle 47 and of which a lower portion is attached to an upper center portion of the seat cushion A; a pair of right and left seat belt 41 of which one end is attached to a rear portion of the seat cushion A and the other end is attached to an upper portion of the seat back B; and a pair of chest tongue plate 47 provided on an intermediate portion of the respective seat belts and capable of being attachably/detachably connected to the two-opening buckle 47 respectively. The other end of the seat belt may pass through an upper portion of the seat back B and may be attached to a rear portion of the seat cushion A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight and simple structure for adults and children.

[0002]

2. Description of the Related Art As an adult / child seat used for a vehicle such as an automobile, a seat portion of a child seat is attached to a seat back of an adult seat so as to be rotatable around a lateral axis.
In some cases, when the seat is not used, the seat is turned upward to be stored in the seat back, and when used, the seat is turned forward to take out the seat. Alternatively, as disclosed in, for example, Japanese Utility Model Laid-Open No. 2-21052, a child seat is attached to the rear surface of an adult seat back and the seat back is moved forward to bring the child seat into a use state. In some cases, a space for accommodating a child seat when the user stands up is formed at the rear side of the seat back.

[0003]

In the first prior art, it is difficult to increase the thickness of the seat portion of the child seat. Therefore, both the seating surface of the child seat and the cushioning of the seat back of the adult seat are reduced. There is a problem of getting worse.
Further, since the seat back has a double structure and the thickness is increased, the weight and manufacturing cost of the seat are increased, and there is also a problem that a compact seat back cannot be accommodated. In addition, there is another problem that it is difficult to take care of the child because the seating surface of the child seat is high. On the other hand, in the second prior art, the cushioning properties of the child seat and the adult seat are both improved, but the weight and manufacturing cost of the seat are further increased, and the seat surface of the child seat is also increased. There is also a problem that the place where it can be attached is limited. An object of the present invention is to solve each of these problems.

[0004]

According to the present invention, there is provided an adult / children's seat according to claim 1 of the present invention, which comprises a seat cushion and a seat back which rises upward from a rear portion thereof, and a vehicle seat on which an adult can sit. It consists of a children's belt attachment that is detachably attached to the vehicle seat.This children's belt attachment has a two-port buckle, a lower part of which is detachably attached to the upper center part of the seat cushion, and one end part. A pair of left and right seat belts that are detachably attached to the rear of the seat cushion and the other end is detachably attached to the upper part of the seat back, and a two-port buckle of a protection pad provided in the middle of each seat belt It consists of a pair of detachably connectable chest tongue plates. According to the first aspect of the present invention, a child's belt attachment is detached when an adult seat is used, and a child's belt attachment is attached when a child seat is used, and a child is seated on an adult seat cushion. I do.

According to a second aspect of the present invention, instead of the other end of each seat belt being detachably attached to the upper part of the seat back as in the first aspect of the present invention, after passing through the upper part of the seat back. It extends downward and is detachably attached to the rear of the seat cushion or the seat back. Similarly to the invention of the first aspect, the invention of the second aspect uses the child's belt attachment when the adult seat is used, and attaches the child's belt attachment when the child seat is used.

According to the first and second aspects of the present invention, as set forth in the third aspect, the lower portion of the protective pad is located at the upper central portion of the seat cushion and connected to the seat cushion frame of the seat cushion. It is preferable that it can be detachably connected to the camera.

According to the first and second aspects of the present invention, the waist tongue plate attached to one end of each seat belt is located at the upper rear portion of the seat cushion. It is preferable that it can be detachably connected to a pair of left and right lower buckles connected to the cushion frame.

According to the first and second aspects of the present invention, one end of each seat belt is connected to each other, and the connecting portion is located at the rear of the seat cushion. It is preferable that the pair of hooks can be detachably engaged with a pair of left and right hooks connected to the seat cushion frame.

According to the present invention, the shoulder tongue plate attached to the other end of each seat belt can be detachably attached to the left and right shoulder buckles attached to the upper portion of the seat back. It is preferable to be able to connect.

According to a second aspect of the present invention, there is provided a shoulder tongue plate attached to the other end of each seat belt extending downward through right and left through holes formed in the upper portion of the seat back. Is preferably detachably connectable to the left and right shoulder buckles connected to the rear portion of the seat cushion frame of the seat cushion or the seat back frame of the seat back.

According to a third aspect of the present invention, as set forth in the eighth aspect, an opening is formed in the seat cushion pad of the seat cushion so that the central cushion can be fitted therein, and the anchor is located in the opening and one end is formed in the seat cushion frame. Is preferably attached to the other end of a flexible central belt that is fixed and rises therefrom.

According to a third aspect of the present invention, as set forth in the ninth aspect, one end portion is connected to the front portion of the seat cushion frame using the anchor as a ring plate, and the center portion of the upper surface along the front surface of the seat cushion. At the other end of the front central belt extending to the front, the protective pad has a flexible belt extending downward and having a central tongue plate at its tip, which belt extends rearward through the ring plate. It is preferable that the center tongue plate at the front end is located at the center of the upper rear portion of the seat cushion so that it can be detachably connected to the center lower buckle connected to the seat cushion frame.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of an adult / pediatric seat according to the present invention will be described with reference to FIGS. As shown in FIG. 7, the adult / pediatric seat is mainly composed of a seat cushion A and a seat back B on which an adult can sit, and a child belt attachment 4 detachably attached to the vehicle seat.
0. As shown in FIG. 1, the vehicle seat is provided with a normal three-point seat belt 28 having a shoulder portion 28a and a wrap portion 28b for restraining a seated adult. The description is omitted to avoid complication of the drawings. The vehicle seat in this embodiment is a rear seat of a passenger car.

As shown in FIGS. 1 to 3, the seat cushion A includes a seat cushion frame 10 and a seat cushion pad 15, and the seat cushion frame 1
Reference numeral 0 denotes a rear portion of the main frame 11 formed of a pipe and a sheet metal member and bent in a substantially U-shape and connected by welding with a connecting pipe 12. An intermediate portion in the front-rear direction of the main frame 11 is welded and connected by an intermediate connection member 13 made of sheet metal parallel to the rear connection pipe 12, and the front and rear portions are also connected by a plurality of laterally supporting wires 13a. The seat cushion pad 15 is covered with a skin, and is placed and attached on the seat cushion frame 10. In the center of the rear half of the seat cushion pad 15, there is an opening 15 in which a rectangular central cushion 16 can be fitted.
a is formed, and the front edge of the opening 15 a is located on the intermediate connecting member 13. A lower cover 17 is provided below the seat cushion A.

As shown mainly in FIGS. 3 and 4, anchors 30 are attached to the intermediate connecting member 13 via a flexible central belt 31, which are located near the front edge in the opening 15a. I have. One end of the central belt 31 is wound around a mounting plate 32 and riveted. The mounting plate 32 is fixed to the intermediate connecting member 13 to be mounted on the seat cushion frame 10. Central belt 3
Numeral 1 is adjustable in length by an adjustment fitting 31a, and an anchor 30 provided at the other end is a tongue plate used in combination with a buckle in a seat belt device or the like in this embodiment. When attaching the children's belt attachment 40, the central belt 31 rises from the attachment plate 32 fixed to the intermediate connecting member 13 as shown in the figure, and a part of the tongue plate 30 at the tip thereof forms the seat cushion pad 15. The central belt 31 and the tongue plate 3
When the central cushion 16 is fitted in the opening 15a, the central cushion 16 is stored in a notch 16a formed in the center of the lower half of the front edge of the central cushion 16.

As shown in FIGS. 1 and 2 and FIGS. 5 to 7, the seat back B comprises a seat back frame 20 and a seat back pad 25, and is provided so as to rise upward from a rear portion of the seat cushion A. . The main part of the seat back frame 20 is a frame 21 having a pipe formed by bending a pipe into a substantially rectangular loop shape, and lower portions on both sides thereof are attached to a rear portion of the seat cushion frame 10 through a reclining mechanism 24 so as to be adjustable in inclination angle. . Two shoulder buckles 34 are attached to the upper and lower surfaces of the connecting member 22 having a U-shaped cross section with the front side opened to connect both upper portions of the frame 21 so that the shoulder buckles 34 are vertically arranged in two steps and are spaced at predetermined intervals in the horizontal direction. Have been. Each shoulder buckle 34 receives and holds a shoulder tongue plate 42a of a child belt attachment 40 to be described later in a front opening thereof.
, And the predetermined lateral spacing is set to a size corresponding to the shoulder width of a child. The seat back pad 25 is covered with the outer skin, and is attached to the front side of the seat back frame 20. Four openings 26 corresponding to the tongue plate receiving ports of the respective mounting brackets 35 are formed.

As shown in FIGS. 2 and 3, a pair of left and right lower buckles 37 are located on the upper rear portion of the seat cushion pad 15, and each of the lower buckles 37 is located outside the rear portion of the seat cushion pad 15. The seat cushion frame 10 is connected to the rear connection pipe 12 by a belt 38 provided along the same.

Next, the child belt attachment 40 is
As shown in FIGS. 7 and 8, it is mainly constituted by a pair of left and right flexible seat belts 41 and protection pads 45. The length of each seat belt 41 can be adjusted by an adjustment fitting 41c provided in the middle, and a waist tongue plate 42b is attached to one lower end, and a shoulder tongue plate 42a is attached to the other end. . The seat belt 41 is divided into a shoulder portion 41a on the shoulder tongue plate 42a side and a body side portion 41b on the waist tongue plate 42b side with the chest tongue plate 42c movably inserted in the middle thereof.
1a is provided with a cylindrical cushion member 43.
As shown in FIG. 8, the protection pad 45 has a front end of a flexible belt 48 a, which is attached to a lower portion of the frame 46 and has a two-port buckle 47 fixed to the upper front side of the frame 46, which is a strength member. The center buckle 48 is connected to the tongue plate 30 only by inserting the tongue plate 30, and the connection is released only by pressing the release button. Except for the protruding portion of the two-port buckle 47 provided with the tongue insertion hole 47a and the tip of the central buckle 48, these portions are cushion pads 49 made of a flexible foam material.
Covered by

When the adult / pediatric seat of the first embodiment is used for an adult, as shown in FIG. 1 (however, the tongue plate 30 is housed in the opening 15a). Used with the child's belt attachment 40 removed. In this state, the seat back is the same as a normal seat except that four openings 26 are provided in the seat back pad 25, so that it can be used in the same manner as the conventional seat, and the cushioning properties of the seat cushion A and the seat back B deteriorate. There is no. The seated adult is restrained by the adult seat belt 28.

When used as a child seat, the child belt attachment 40 is connected to a two-dot chain line 40A in FIG.
Attach as shown. That is, first, the protection pad 4
5, the tongue plate 30 is inserted and connected to the lower central buckle 48, and each shoulder tongue plate 42a of the left and right seat belts 41 is inserted and connected to each shoulder buckle 34 from the opening 26 of the seat back pad 25, and each waist tongue is connected. By inserting and connecting the plate 42b to each lower buckle 37, the child belt attachment 4
0 is detachably attached to the seat cushion A or the seat back B. Then, the child is seated on the seat cushion pad 15, and each chest tongue plate 42c is inserted into and connected to the two-port buckle 47 of the protection pad 45 to restrain the child. Since the child sits on the seat cushion A, the seating position of the child does not increase, and the child can be easily taken care of. Upper and lower shoulder buckle 34
Is used depending on the height of the child to be used. In this child use state, the adult seat belt 2
8 is not used.

In the first embodiment, only the tongue plate 30, the shoulder buckle 34, the lower buckle 37, and their attached parts need to be provided on the vehicle seat including the seat cushion A and the seat back B. Since both are small, the structure of the seat is not complicated and the weight and manufacturing cost are not increased, and it is easy to cope with a compact seat back. The attachment and detachment of the child belt attachment 40 to and from the seat cushion A and the seat back B are extremely easy and reliable because the buckle and the tongue plate are used.

The child belt attachment 40 is
Since the seat cushion A and the seat back B are detachable from the vehicle seat on which an adult can sit, a user who needs only an adult seat does not need to purchase the pediatric belt attachment 40 for the time being. Since the user only has to buy the product when it becomes necessary, the user has more flexibility in purchasing.

Next, a second embodiment will be described with reference to FIGS. This embodiment increases the length of each seat belt 41 of the child belt attachment 40,
The point that a through hole C is provided in place of the shoulder buckle 34 and the shoulder buckle is different from the first embodiment only in that the shoulder buckle is provided at the rear portion of the seat cushion A as shown by reference numeral 34A is mainly described. I do.

As in the first embodiment, the lower buckle 3
7 is the rear connecting pipe 1 of the seat cushion frame 10
2 has a shoulder buckle 34A
A short belt 38A is sewn. The connecting member 22A connecting the upper sides of the frame 21 of the seat back frame has a shallow U-shaped cross section,
Through holes 22a are formed at four positions corresponding to each shoulder buckle 34 of the embodiment. Openings 26A are formed in front and rear portions of the seat back cushion 25A in alignment with the through holes 22a. In the upper part of the seat back B1 of this embodiment, two through holes C each on the left and right, which are formed by the through holes 22a and the openings 26A, are inserted through the shoulder tongue plates 42a of the seat belt 41. Possible dimensions. In the child belt attachment 40, the shoulder portion 41a of each seat belt 41 is elongated.

The operation when the adult / pediatric seat of the second embodiment is used for an adult is exactly the same as that of the first embodiment. When used as a child seat, the front ends of the left and right seat belts 41 provided with the shoulder tongue plates 42a extend downward through the through holes C in the upper portion of the seat back B1 as shown in FIG. The tongue plate 42a is inserted and connected to a shoulder buckle 34A provided on the seat cushion A.
The central buckle 48 below the protection pad 45 and the waist tongue plates 42b of the left and right seat belts 41 are connected to the tongue plate 30 and the lower buckle 37 in the same manner as in the first embodiment. Then, each chest tongue plate 42c is connected to the protection pad 45 in the same manner as in the first embodiment.
Of the seat cushion pad 15 is restrained. In the second embodiment, the same operation and effect as those of the first embodiment can be obtained, and only the through hole C through which the shoulder tongue plate 42a passes is provided at the upper portion of the seat back B1. The thickness of the seat back B1 can be reduced. In addition, the shoulder buckle 34A of this embodiment is
Instead of connecting to the rear connecting pipe 12, it may be connected to the lower part of the seat back frame 20.

Next, a third embodiment will be described with reference to FIGS. In this embodiment, one end of each of the seat belts 41 is connected to each other, and the lower buckles 3 are attached to the left and right belts 38 provided on the seat cushion frame 10.
7 is different from the first embodiment only in that a pair of hooks 37B is provided instead of the left and right and the structure of the protection pad 45 is slightly changed. Therefore, this difference will be mainly described.

As shown in FIG. 11, each of the seat belts 41 of the third embodiment has one end on the side of the body side portion 41b connected to each other, and this connection portion 41d has a length adjusting portion. An adjustment fitting 44 is provided. FIG.
As shown in FIG. 2, the left and right belts 38 connected to the rear connection pipe 12 of the seat cushion frame 10 are shorter in length than in the first embodiment, and each end has a belt instead of the lower buckle 37. A hook 37B having a shape obtained by folding a plate in two is attached. Protection pad 45
Has a central tongue plate 48b provided at the end of a flexible belt 48a extending downward and having a long length. In this embodiment, FIGS. 2 and 1
As shown in FIG. 3, a central lower buckle 3 similar to the lower buckle 37 is provided in the upper rear center of the seat cushion pad 15.
7A, is connected to the rear connecting pipe 12 of the seat cushion frame 10 by a belt 38A similar to the belt 38, and the intermediate connecting member 13 is connected via the central belt 31.
Is a ring plate 30A through which the central tongue plate 48b can be inserted.

The operation when the adult / pediatric seat according to the third embodiment is used for an adult is exactly the same as that of the first embodiment. When used as a child seat, as shown in a two-dot chain line 40A in FIG. 11 and FIG.
d is passed backward from between the seat cushion pad 15 and the seat back pad 25, and is detachably engaged with the left and right hooks 37B. Belt 48 extending from protection pad 45
a The center tongue plate 48b at the tip is pulled backward through the ring plate 30A and connected to the center lower buckle 37A at the rear center, whereby the protection pad 45
Is the ring plate 3 at the upper center of the seat cushion A
It is detachably attached to 0A. Each seat belt 41
Shoulder tongue plate 42a at the tip of shoulder 41a
Is connected to the shoulder buckle 34 of the seat back B through the opening 26 as in the first embodiment. Then, each chest tongue plate 42c is inserted and connected to the two-port buckle 47 of the protection pad 45 in the same manner as in the first embodiment to restrain a child sitting on the seat cushion pad 15. In the third embodiment, the same operation and effect as those of the first embodiment can be obtained, and in addition, two sets of the lower buckle 37 and the waist tongue plate 42b can be replaced by two hooks 37B. The mounting structure of that part is simplified.

The ring plate 30A for locking the belt 48a of the protection pad 45 is connected to the intermediate connecting member 13 of the seat cushion frame 10 by the central belt 31 as in the third embodiment, as shown in FIG. As shown in (1), one end may be provided at the other end of the front central belt 31A connected to the front of the main frame 11 and extending to near the center of the upper surface along the front surface of the seat cushion pad 15. In this way, the seat cushion pad 15 can be simplified by eliminating the opening 15a and the center cushion 16. In this case,
Adjustment bracket 31 for central belt 31 on front central belt 31A
If the same adjustment bracket as that of FIG.
Of the ring plate 30A can be adjusted.

In the above-described embodiment, an example in which the present invention is applied to a rear seat of a passenger car and a single-seat is shown. However, the present invention may be applied to a passenger seat of a passenger car, or to a bench-type seat. It is also possible to apply.

[0031]

According to the first aspect of the present invention, a child's belt attachment is detached when an adult seat is used, and a child's belt attachment is attached when a child seat is used. To use. Therefore, the seat cushion only needs to be provided with a mounting portion for the lower portion of the protective pad and one end of each seat belt, and the seat back only needs to be provided with a mounting portion for the other end of each seat belt. The seat back does not impair cushioning. Further, the structure is not complicated and the weight and the manufacturing cost are not increased, and it is easy to cope with a compact seat back. Furthermore, since the child sits on the adult seat cushion, the seating surface of the child seat does not increase, and the child is easily cared for. In addition, since the child's belt attachment can be purchased when it becomes necessary, the user has a greater degree of freedom in purchasing.

According to the second aspect of the invention, in addition to the effects of the first aspect, it is only necessary to provide a hole for passing the other end of each seat belt at the upper portion of the seat back. It can be made even thinner, and can respond to a more compact seat back.

According to the third aspect of the present invention, since the lower portion of the protection pad is connected to the anchor connected to the seat cushion frame of the seat cushion, the protection pad is securely attached to the seat cushion.

According to the fourth aspect of the invention, the waist tongue plate attached to one end of each seat belt is connected to the pair of left and right lower buckles connected to the seat cushion frame. Attachment of one end is reliable, and attachment and detachment are easy.

According to the fifth aspect of the present invention, one end portions of the respective seat belts are connected to each other, and this connecting portion can be detachably engaged with a pair of left and right hooks connected to the seat cushion frame. The structure for attaching one end of the seat belt to the seat cushion is simplified.

According to the sixth aspect of the present invention, the shoulder tongue plates attached to the other end of each seat belt are connected to the left and right shoulder buckles attached to the upper portion of the seat back. The other end is securely attached and easily detached.

According to the seventh aspect of the present invention, the shoulder tongue plate attached to the other end of each seat belt extends downward after passing through the left and right holes formed in the upper portion of the seat back and is attached to the seat cushion frame. Since the left and right shoulder buckles are connected to each other, the other end of each seat belt is securely attached to the seat back and the seat cushion, and is easily attached and detached. Further, since only a hole for passing the shoulder tongue plate is provided at the upper portion of the seat back, the thickness of the seat back can be reduced.

According to the present invention, an opening is formed in the seat cushion pad of the seat cushion so that the central cushion can be fitted therein, and the anchor is attached to the other end of the flexible central belt located in the opening. In this case, the anchor can be accommodated in the opening when the pediatric belt attachment is removed so as not to obstruct the seating of the adult.

According to the ninth aspect of the present invention, the anchor is connected to the front portion of the seat cushion frame as a ring plate and is connected to the other end of the front center belt extending to the center along the front surface of the seat cushion. The protective pad shall have a flexible belt extending downward and having a central tongue plate at its tip, which belt extends rearward through the ring plate and attaches its central tongue plate to the top of the seat cushion. If it can be detachably connected to the center lower buckle which is located at the rear center and connected to the seat cushion frame, the seat cushion pad can be simplified by eliminating the opening and the center cushion.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an adult / pediatric seat according to a first embodiment of the present invention with a child belt attachment removed.

FIG. 2 is an overall perspective view showing a frame structure of the embodiment shown in FIG.

FIG. 3 is a longitudinal sectional view near the center of the seat cushion of the embodiment shown in FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is a partial front view showing the shoulder buckle of the embodiment shown in FIG. 1 and its mounting structure.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is an overall perspective view including the child's belt attachment of the embodiment shown in FIG. 1;

FIG. 8 is a longitudinal sectional view showing a protection pad of the child belt attachment shown in FIG. 7;

FIG. 9 is an overall perspective view substantially corresponding to FIG. 7 of the second embodiment according to the present invention.

10 is a longitudinal sectional view showing a rear portion of a seat back and a seat cushion of the embodiment shown in FIG. 9;

FIG. 11 is an overall perspective view corresponding to FIG. 7 of a third embodiment according to the present invention.

FIG. 12 is a longitudinal sectional view near one side of the seat cushion of the embodiment shown in FIG. 11;

FIG. 13 is a longitudinal sectional view near the center of the seat cushion of the embodiment shown in FIG. 11;

FIG. 14 is a longitudinal sectional view corresponding to FIG. 13 showing a modification of the third embodiment.

[Explanation of symbols]

10: Seat cushion frame, 15: Seat cushion pad, 15a: Opening, 16: Central cushion,
20 ... seat back frame, 30 ... anchor, 31 ...
Central belt, 34: shoulder buckle, 34A: shoulder buckle, 37: lower buckle, 37B: hook, 4
0: Children's belt attachment, 41: Seat belt, 41d: Connection part, 42a: Shoulder tongue plate,
42b: waist tongue plate, 42c: chest tongue plate, 45: protective pad, 47: two-port buckle, A: seat cushion, B, B1: seat back, C: through hole.

Claims (9)

[Claims] 1. A vehicle seat comprising an seat cushion and a seat back standing upright from a rear portion thereof, on which an adult can sit, and a child belt attachment detachably attached to the vehicle seat, wherein the child belt attachment is provided. A protective pad having a two-port buckle and a lower portion detachably attached to an upper central portion of the seat cushion, and one end portion detachably attached to a rear portion of the seat cushion and another end portion located above the seat back. A pair of left and right seat belts removably attached to the vehicle and a pair of chest tongue plates provided at the middle of each seat belt and detachably connectable to the two-port buckle of the protective pad. Sheet. 2. The rear end of the seat cushion, wherein the other end of each seat belt extends downward through an upper portion of the seat back instead of being detachably attached to an upper portion of the seat back. 2. The adult / pediatric seat according to claim 1, which is detachably attached to a seat back. 3. The protection pad according to claim 1, wherein a lower portion of the protection pad is removably connectable to an anchor located at an upper central portion of the seat cushion and connected to a seat cushion frame of the seat cushion. Adult / pediatric combined use seat as described in. 4. A waist tongue plate attached to the one end of each seat belt is attached to and detached from a pair of left and right lower buckles located at an upper rear portion of the seat cushion and connected to a seat cushion frame of the seat cushion. The adult / pediatric seat according to claim 1 or 2, which is freely connectable. 5. An end of each of the seat belts is connected to each other, and this connection portion is attached to and detached from a pair of left and right hooks located at a rear portion of the seat cushion and connected to a seat cushion frame of the seat cushion. 3. The adult / pediatric seat according to claim 1 or 2, which is freely engageable. 6. The seat tongue according to claim 1, wherein a shoulder tongue plate attached to the other end of each of the seat belts is detachably connectable to left and right shoulder buckles attached to an upper portion of the seat back. Adult and child combined use seat. 7. A shoulder tongue plate attached to the other end of each of the seat belts extending downward after passing through right and left through holes formed in an upper portion of the seat back,
3. The adult / pediatric seat according to claim 2, wherein the seat is removably connectable to left and right shoulder buckles connected to a rear portion of the seat cushion frame of the seat cushion or the seat back frame of the seat back. 8. The seat cushion pad of the seat cushion has an opening through which a central cushion can be fitted, and the anchor is located in the opening, one end of which is fixed to the seat cushion frame and stands up therefrom. The adult / pediatric seat according to claim 3, which is attached to the other end of the central belt. 9. The front end of a front central belt, which is connected to a front portion of the seat cushion frame at one end as a ring plate and extends along a front surface of the seat cushion to a center portion of an upper surface thereof. Wherein the protective pad comprises a flexible belt extending downwardly and having a central tongue plate at its distal end, the belt extending rearward through the ring plate and the central tongue plate at its distal end being attached to the seat. 4. The adult / pediatric seat according to claim 3, wherein the seat is detachably connected to a central lower buckle which is located at a center of an upper rear portion of the cushion and connected to the seat cushion frame.