JP6104418B1 - Auxiliary seat for infant - Google Patents

Abstract

An inner surface interval of a left and right upper connecting portion of a protector connected to a headrest is made narrower than an outer surface interval of left and right side portions of the headrest. A seat 3 having a backrest 3B at the rear upper part of a seat part 3A and a headrest 3C above the backrest part 3B, and a protector 4 extending from the headrest 3C to the seat part 3A in front of the seated person. . The protector 4 has a left and right upper connecting portion 4U and a lower connecting portion 4D. The left and right upper connecting portion 4U is connected to an upper support portion 5 provided on the left and right side portions of the headrest 3C, and the lower connecting portion 4D is a seat portion. It is detachably fixed to the seat side fixture 6 provided in 3A. The headrest 3C is supported so as to be able to swing backward with respect to the backrest portion 3B, and the inner surface α on the seated person side of the left and right upper connecting portion 4U of the protector 4 is disposed inward from the outer surface β of the left and right side portions of the headrest 3C. Yes. [Selection] Figure 2

Description

  The present invention relates to an infant auxiliary seat mounted on a bicycle or the like.

  As disclosed in Patent Document 1, a conventional infant auxiliary seat includes a seat body that is detachably attached to a bicycle handle, and the seat body extends substantially horizontally in the left-right direction. An infant seat for a bicycle, which is attached to be freely tiltable in the front-rear direction with an axis as a tilting shaft, wherein the seat body has a seat back portion, and an upper end portion is pivotally attached to the upper back of the seat back portion. There is also a bicycle infant seat (Claim 1) that further includes a seat bar that is mounted so as to be swingable in the front-rear direction about a pivoting portion with the seat back portion.

  Further, as disclosed in Patent Document 2, the upper portion of the safety bar is pivotally supported on the headrest of the seat body having the seat portion, the backrest portion, and the headrest, and the safety bar can be changed between the operation position and the opening / closing operation position. In addition, there is an infant bicycle seat in which the lower part of the safety bar in the working position can be connected to the seat.

Japanese Patent No. 4460873 European Patent Publication EP1164075A1

  In both the above prior arts, when the infant gets on and off, the seat bar (safety bar, protective equipment) is swung upward with the headrest for supporting the head of the infant (or with respect to the headrest) above the seat back portion. Although it can be retracted, the upper left and right sides of the seat bar must be placed outside the outer surface of the left and right side portions of the headrest. Usually, since the headrest is provided with a thick cushion material, the distance between the outer surfaces of the left and right side portions of the headrest is wide, and the distance between the left and right upper portions of the seat bar may be wider than the shoulder width of the infant.

An object of the present invention is to provide an auxiliary seat for infants that can solve such problems of the prior art.
It is an object of the present invention to provide an auxiliary seat for infants in which the inner surface distance of the left and right upper connecting parts of the protector connected to the headrest can be made smaller than the outer surface distance of the left and right side parts of the headrest.

Specific means for solving the problems in the present invention are as follows.
First, the seat 3A, the seat 3 having the backrest 3B at the rear upper part of the seat 3A and the headrest 3C at the upper part of the backrest 3B, and the protective equipment from the headrest 3C through the front of the seated person to the seat 3A 4 and
The protector 4 includes a left and right upper connecting portion 4U and a lower connecting portion 4D. The left and right upper connecting portion 4U is connected to an upper support portion 5 provided on the left and right side portions of the headrest 3C, and the lower connecting portion 4D is seated. It is detachably fixed to the seat part side fixture 6 provided in the part 3A,
The headrest 3C is supported so as to be swingable backward with respect to the backrest portion 3B.
The inner surface α on the seated person side of the left and right upper connecting portion 4U of the protector 4 is arranged inward from the outer surface β of the left and right side portions of the headrest 3C.

  Secondly, the protector 4 has a left and right upper connecting portion 4U and a central lower connecting portion 4D, and is formed in a substantially Y shape when viewed from the front, and the left and right upper connecting portion 4U is on the left and right sides of the headrest 3C. It is connected to the left and right upper holding part 5 provided at the lower part of the part, and a lower attachment part 7 is provided in the lower coupling part 4D. It is characterized in that it is detachably fixed from.

Thirdly, the lower fixture 7 of the protector 4 is connected to the lower coupling portion 4D so that the vertical position can be changed.
Fourth, the left and right upper connecting portions 4U of the protector 4 are connected to the left and right upper holding portions 5 so that the front and rear positions can be freely changed.
The seat-side fixture 6 is connected to the seat portion 3A so that the front-rear position can be changed.

  Fifth, a headrest mounting mechanism 8 is provided on the backrest 3B. The headrest mounting mechanism 8 is fixed to the backrest 3B, and a headrest receiving member 9 fixed to the headrest receiving member 9 so that the vertical position can be changed. And a headrest support member 10 that supports the headrest 3 </ b> C so that the headrest 3 </ b> C can swing backward is provided at an upper portion.

According to this invention, the space | interval of the right-and-left upper connection part of the protector connected with a headrest can be made narrower than the outer surface space | interval of the right-and-left side part of a headrest.
That is, according to the first aspect of the present invention, the left and right upper connecting portion 4U of the protector 4 connected to the upper holding portion 5 provided on the left and right side portions of the headrest 3C has an inner surface α on the seater side that is the left and right sides of the headrest 3C. Since it is arranged inward from the outer surface β of the side part, the inner surface distance of the left and right upper connecting part 4U can be made smaller than the outer surface distance of the left and right side parts of the headrest 3C.

According to the second aspect of the present invention, the protector 4 is formed in a substantially Y shape when viewed from the front, and the lower mounting tool 7 provided in the lower connecting part 4D in the center is detachable from the front side of the seat side fixing tool 6. Therefore, the protector 4 can be placed between the occupant's shoulder and the crotch, and can be lowered from above the occupant's shoulder and secured to the seat portion 3A between the crotch.
In the invention according to claim 3, the headrest 3C is supported so that the vertical position can be changed with respect to the backrest part 3B, and the lower mounting tool 7 of the protector 4 is connected to the lower coupling part 4D so that the vertical position can be changed. Therefore, the height of the protector 4 can be changed.

In the invention according to claim 4, the left and right upper connection portions 4U of the protector 4 are connected to the left and right upper support portions 5 so that the front and rear positions can be changed, and the seat side fixing tool 6 is connected to the seat portion 3A. The front and rear positions of the protector 4 can be changed.
In the invention according to claim 5, the headrest mounting mechanism 8 is provided between the headrest 3C and the backrest 3B, and the headrest 3C is supported by the headrest mounting mechanism 8 so that the vertical position can be changed and the backrest can swing. be able to.

It is a cross-sectional side view of the protector overhang | projection state which shows 1st Embodiment of this invention. It is the same front view. It is the same top view. It is a sectional side view of a protector contraction state. It is a cross-sectional side view of a headrest attachment mechanism. FIG. 6 is a view on arrow X in FIG. 5. It is a cross-sectional side view which shows the connection structure of the upper part of a protector. It is the YY sectional view taken on the line of FIG. It is a cross-sectional side view which shows the connection structure of the lower part of a protector. It is a perspective view of the protector overhang | projection state which shows 2nd Embodiment of this invention. It is a disassembled perspective view which shows the connection structure of the lower part of a protector.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 9 show an infant auxiliary seat 1A according to the first embodiment of the present invention. The infant auxiliary seat 1A is roughly divided into a seat 3 having a headrest 3C and a front of a seated person from the headrest 3C. And a protector 4 that passes through the seat 3A.
The seat 3 includes a seat portion 3A having a portion that supports the buttocks of the seated person (infant) and a portion sandwiched between the legs, a backrest portion 3B that stands up from the rear portion of the seat portion 3A and supports the back of the seated person, An armrest portion 3D projecting forward from the left and right side portions of the backrest portion 3B is integrally formed, and a separately formed headrest 3C is mounted on the upper portion of the backrest portion 3B.

  The headrest 3C is a rear center portion 3Ca that supports the back of the seated person's head (usually wearing the helmet 15), and a side that protrudes left and right forward from the center portion 3Ca and covers the left and right sides of the helmet 15. The portion 3Cb is integrally formed, and a thick cushion material 16 is provided on the inner surface (surface on the seated person's head side) of the rear center portion 3Ca and the left and right side portions 3Cb.

  As shown in FIGS. 1, 2, 4 to 6, a headrest mounting mechanism 8 is provided on the backrest 3B. The headrest mounting mechanism 8 includes a headrest receiving member 9 fixed to the back surface of the backrest portion 3B, and a headrest support that is fixed to the headrest receiving member 9 so that the vertical position can be changed and the headrest 3C is supported to be swingable backward. It comprises a member 10 and a headrest fastener 11 that fixes the headrest support member 10 to the headrest receiving member 9.

The headrest receiving member 9 has a rectangular tube shape with a hole penetrating in the vertical direction, and a hole 9a is formed in the front and rear walls thereof.
The headrest support member 10 is inserted into the headrest receiving member 9 so that the vertical position can be freely changed, and three circular holes 10a that can be opposed to the holes 9a of the headrest holding member 9 are inserted in the insertion portion. A narrow groove 10b that communicates the round holes 10a with each other is formed.

The headrest fastener 11 includes a fastening member 17 inserted into the hole 9a and the round hole 10a from the rear of the headrest holding member 9, a stop plate 18 that comes into contact with the front surface of the headrest receiving member 9, and the stop plate 18 And a screw member 19 for fixing the fastening member 17, and the fastening member 17 is formed with an oval section 17 a in cross section.
As shown in FIG. 6, the fastening member 17 includes two outer circumferential arc surfaces a1 in which the cross-sectional oval portion 17a fits and fits into the round hole 10a of the headrest support member 10, and two intervals that can pass through the narrow groove 10b. When the outer circumferential arc surface a1 is in contact with the hole surface of the round hole 10a, the headrest support member 10 is fixed to the headrest receiving member 9, and the side surface a2 is connected to the narrow groove 10b. When parallel, the headrest support member 10 can be moved up and down with respect to the headrest support member 9.

The fastening member 17 is attached to the headrest receiving member 9, and the headrest support member 10 is fixed by fitting the outer peripheral arc surface a1 of the oval section 17a to the round hole 10a, and the three round holes 10a are selected. The vertical position of the headrest support member 10 can be changed and set at three locations.
At the upper part of the headrest support member 10, a pivotal support portion 20 is provided that supports the headrest 3C with respect to the backrest portion 3B so as to be swingable backward. The pivot portion 20 has a protruding portion 20a formed rearward and upward from the left and right ends of the upper end of the headrest support member 10, and one end of the pivot shaft 21 is supported by the protruding portion 20a. A support piece 20b that supports the other end of the pivot shaft 21 is bolted.

  A pivot tube 23 provided at the lower back of the headrest 3C is fitted in the middle of the pivot shaft 21, and the headrest 3C is supported so as to be able to swing back and forth around the pivot shaft 21, as shown by a solid line in FIG. It can be rotated from the protection posture in the standing state shown to the retracted posture in the rearward tilt state indicated by the two-dot chain line (or its front and rear positions). The protective posture of the headrest 3 </ b> C is ensured and maintained by connecting the lower coupling portion 4 </ b> D of the protective device 4 to the seat-side fixture 6.

  As shown in FIGS. 1 to 4, the protective device 4 is a seat bar formed of a light metal such as a synthetic resin or aluminum so as to have a substantially Y shape when viewed from the front side and a substantially left side shape when viewed from the side. Opposite the left and right shoulders of the seated person, a pair of left and right upper connecting parts 4U are provided, the lower part is located between the crotch of the seated person, and one lower coupling part 4D is provided at the center. A lower fixture 7 is provided in the coupling portion 4D so that the vertical position can be changed. The protector 4 may be solid or hollow inside the main body, and a cushion material is attached to the outer periphery thereof.

1-4, 7 and 8, the left and right upper connecting portions 4U of the protector 4 have a smaller diameter than the main body portion of the protector 4 and are connected via a stepped portion Ua. The upper connecting portion 4U Is oval or oval in cross section, has a screw hole Ub formed on the outer side surface, and is connected to the upper support portion 5 fixed to the lower side of the side portion 3Cb of the headrest 3C so that the front and rear positions can be changed.
The upper holding part 5 is a cylindrical body having a cross-sectional oval or elliptical hole penetrating in the front-rear direction, a lateral hole 5a is perforated on the outer surface side, and the male screw of the bar upper fastener 25 is connected to the lateral hole 5a. Then, the left and right upper connecting portions 4U of the protector 4 can be connected and fixed to the upper support portion 5 of the headrest 3C by being screwed into one of the two front and rear screw holes Ub of the upper connecting portion 4U.

By changing the screw hole Ub into which the bar upper fastener 25 is screwed, the front / rear position of the upper connecting portion 4U with respect to the upper holding portion 5 can be changed.
4 shows a state in which the state shown in FIG. 4 is contracted with respect to the seat 3, and FIG. 1 shows a state in which the protective device protrudes upward and protrudes forward.
The upper support portion 5 is disposed substantially directly below the side portion 3Cb (with the cushioning material 16 attached) of the headrest 3C, and the left and right upper support portions 5 facing the left and right side surfaces of the helmet 15. The inner surface is substantially flush with the inner surface of the side portion 3Cb of the headrest 3C.

Therefore, the inner surface α on the seating person side of the left and right upper connecting portion 4U of the protector 4 is disposed at least inward from the outer surface β of the left and right side portions of the headrest 3C, and the inner surface of the left and right upper connecting portion 4U of the protector 4 The left-right distance of α is set to be narrower than the left-right distance of the outer surface β of the left and right side portions of the headrest 3C.
Since the cushion material 16 is compressed and deformed, in consideration of the compressed state, the left-right distance of the inner surface α of the left and right upper connecting portion 4U of the protector 4 is larger than the left-right distance of the inner surface of the left and right side portions 3Cb of the headrest 3C. The protector 4 can swing without contacting the left and right sides of the helmet 15 and can face the shoulder of the seated person that is narrower than the left-right distance of the outer surface β of the left and right side portions 3Cb of the headrest 3C. I am doing so.

  The upper holding portion 5 and the upper connecting portion 4U are located at a height substantially corresponding to the neck of the seated person, and the inner surface distance of the cushion material 16 of the left and right side portions 3Cb of the headrest 3C is larger than the left and right side surface intervals of the helmet 15. Since it is wide, the inner surface α of the upper support portion 5 may be substantially flush with the inner surface of the cushion material 16 of the side portion 3Cb of the headrest 3C as long as the protector 4 can swing with respect to the helmet 15.

1 to 4 and 9, a groove Da is formed on the back surface of the lower coupling portion 4D in the center of the protector 4, and the back surface side of the groove Da is closed with a lid Db. 7 is inserted from below so that the vertical position can be changed. The lower fixture 7 is provided with female screws 7a at three locations, and the male screws of the bar lower fastener 27 penetrating the lower coupling portion 4D are screwed together.
The lower coupling portion 4D and the lower attachment 7 are disposed substantially parallel to the headrest receiving member 9 and the headrest support member 10 of the headrest attachment mechanism 8, and the three female screws 7a of the lower attachment 7 are headrest support members. 10 corresponding to the three round holes 10a, and when the height of the lower coupling portion 4D is changed with respect to the lower fixture 7, the height of the headrest support member 10 is also parallel to the headrest holding member 9. Changed to

A lower portion of the lower fixture 7 is detachably connected to a seat-side fixture 6 provided on the seat 3A via a lock 29, and the seat-side fixture 6 has a fastener 31 attached to the seat 3A. It is fixed so that the front and rear position can be freely changed.
The seat-side fixture 6 includes a base plate portion 6a placed on the upper surface of the upper wall of the seat portion 3A, a mounting portion 6b rising from the base plate portion 6a, and a reverse projecting downward at the rear lower portion of the mounting portion 6b. And a T-shaped locking portion 6c.

  On the upper wall of the seat portion 3A, as shown in FIG. 9, an engagement hole 33 in which two round holes are communicated with each other through a narrow groove and a T-shape to which the latch portion 6c of the seat-side fixture 6 is latched. A shaped locking hole 35 is formed. With the locking portion 6c locked to the upper surface of the upper wall of the seat portion 3A, the substrate portion 6a is disposed above the engagement hole 33, and the substrate portion 6a is fixed to the seat portion 3A via the fastener 31. The lower portion of the lower mounting tool 7 is fitted to the mounting portion 6 b and is mounted via the lock tool 29.

The fastener 31 includes a stop plate 31a that is in contact with the lower surface of the upper wall of the seat portion 3A, and a fixing member 31b that is screwed to the stop plate 31a.
The fixing member 31 b is formed in an oval cross-section that passes through the hole of the base plate portion 6 a of the seat-side fixture 6 and enters the engagement hole 33, and the two arcuate surfaces are two round holes of the engagement hole 33. Either one of the two is adapted to be fitted, and the circular holes to be engaged can be changed by moving the two planes parallel to the hole communicating narrow groove. When the fixing member 31 b moves in the engagement hole 33 to change the fixing position of the seat-side fixture 6, the locking portion 6 c moves in the locking hole 35.

  The lock member 29 has a T-shaped (a shape in which the center of the horizontal bar portion is connected to the tip of the vertical bar portion) and the vertical bar portion of the lock member 29A penetrates the lower portion of the lower fixture 7 and protrudes forward. A knob portion 29B is bolted to the end. The mounting portion 6b of the seat-side fixture 6 is an internal cavity, and a long hole 34 is formed in the front wall in the horizontal direction. The long hole 34 is a horizontal bar of the T-shaped lock member 29A. The portion can be inserted, and the lock member 29A is inserted through the long hole 34 and the horizontal bar portion is rotated 90 ° around the vertical bar portion, whereby the horizontal bar portion rotates within the internal cavity of the mounting portion 6b. Thus, the front wall can be engaged.

  The lower part of the lower fixture 7 is inserted into the elongated hole 34 with the horizontal bar portion of the lock tool 29 being leveled while being directed to the mounting portion 6b of the seat side fixture 6 from the front, and rotated 90 ° after insertion. Then, the horizontal bar portion is engaged with the front wall in the vertical direction to lock the locking device 29 with respect to the mounting portion 6b. Unlocking is performed by rotating the lock member 29 by 90 ° about the vertical bar portion with the knob portion 29B, and inserting and removing the horizontal bar portion from the elongated hole 34.

10 and 11, an infant auxiliary seat 1B according to a second embodiment of the present invention is shown. The infant auxiliary seat 1B includes the infant auxiliary seat 1A, the shape of the left and right upper parts of the protector 4, and the lower center. The coupling portion 4D, the lower fixture 7, the seat portion side fixture 6 and the like are different.
The left and right upper connection portions 4U of the protector 4 are oval or oval in cross section, but there is no step between the protector 4 and the main body portion of the protector 4 from the front end of the upper link portion 4U. The taper shape gradually increases.

The lower center coupling portion 4D of the protector 4 has a recess 40 formed on the back surface, and a plurality of upper and lower triangular projections 41 and a hole 42 into which the male screw of the bar lower fastener 27 can be inserted are formed on the front surface of the recess 40. Long grooves 43 in the vertical direction are formed on the left and right side surfaces of the recess 40.
The lower fixture 7 is formed with a plurality of triangular cutouts 44 that can be engaged with the triangular protrusions 41 of the recess 40 and a plurality of screw holes 45 into which the bar lower fastener 27 can be screwed on the front surface. A protrusion 46 that engages with the left and right long grooves 43 and is slidable in the vertical direction is formed.

In addition, a lock hole 47 is formed in the lower portion of the lower fixture 7, and the vertical bar portion of the T-shaped lock tool 29 is inserted into the lock hole 47, and the horizontal bar portion of the lock tool 29 protrudes rearward. ing.
The lower fixture 7 can change the vertical position with respect to the lower coupling portion 4D by moving the protrusion 46 in the long groove 43, and the triangular notch 44 is engaged with the triangular protrusion 41 at the changed position. The position is set by the above, and the position is fixed by screwing the bar lower fastener 27 so as to face the screw hole 45.

  The seat-side fixture 6 has a substrate portion 6a and a mounting portion 6b. The mounting portion 6b is formed in a U-shape in a plan view opened forward, and has a long hole 48 formed in the horizontal direction. The lower portion of the lower mounting tool 7 is received from the front, and the horizontal bar portion of the locking tool 29 29A is inserted into the long hole 48 and rotated 90 ° to prevent the lower fixture 7 from being detached. Unlocking can be performed by simply rotating the lock 29 by 90 °.

The base plate portion 6a of the seat-side fixture 6 may have the same structure as that of the first embodiment or a bolt fixing structure, as long as it can be fixed so that the front-rear position can be changed.
In the present invention, the shape of each member and the positional relationship between the front, rear, left, and right in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.

  For example, although the seat-side fixture 6 is formed of a rigid body, if the mounting portion 6b can be swung back and forth with respect to the substrate portion 6a by being formed of an elastically deformable member, the substrate portion 6a is Even if the front / rear position is not changed with respect to the upper surface of the upper wall of the seat portion 3A, the mounting portion 6b to which the lower mounting tool 7 is connected swings back and forth, so The front / rear position can be changed with respect to the holding portion 5.

The lower coupling portion 4D is thinned to form a long hole in the vertical direction, the lower fixture 7 is formed of a cylindrical material and fitted into the lower coupling portion 4D, and the bar lower fastener 27 is attached to the lower fixture 7 and the lower You may comprise so that it may insert in the long hole of coupling | bond part 4D, and the lower attachment 7 may be connected to lower coupling | bond part 4D so that a vertical position change is possible.
Further, the protector 4 is formed in a substantially H shape when viewed from the front, and a pair of upper connecting portions 4U and lower connecting portions 4D are provided on the left and right sides, and left and right connecting portions 4A of the seat 3 are connected to the left and right lower connecting portions 4D. A seat-side fixture 6 can also be provided.

  Further, the headrest fastener 11 includes a hole in which the round hole 10a communicates with the narrow groove 10b, and a fastening member 17 having an oval section 17a. The same applies to the fastener 31 of the seat side fixing tool 6. However, they may be composed of bolts and female screws.

DESCRIPTION OF SYMBOLS 1 Infant auxiliary seat 3 Seat 3A Seat part 3B Backrest part 3C Headrest 3Ca Rear center part 3Cb Side part 4 Protective tool 4D Lower coupling part 4U Upper connection part 5 Upper support part 6 Seat part side fixing tool 7 Lower attachment tool 8 Headrest Mounting mechanism 9 Headrest receiving member 10 Headrest support member 15 Helmet 16 Cushioning material 17 Fastening member 21 Pivoting shaft 29 Locking tool 31 Fastener α Inner surface of upper coupling portion β Outer surface of headrest side portion

Claims (5)

A seat (3A), a seat (3) having a backrest (3B) on the rear upper part of the seat (3A) and a headrest (3C) on the upper part of the backrest (3B), and the front of the seated person from the headrest (3C) A protective device (4) that passes through the seat (3A),
The said protector (4) has a left-right upper connection part (4U) and a lower coupling part (4D), and the upper support part (4U) which the left-right upper connection part (4U) provided in the left-right side part of a headrest (3C) ( 5), and the lower coupling portion (4D) is detachably fixed to the seat portion side fixing tool (6) provided in the seat portion (3A),
The headrest (3C) is supported so as to be swingable backward with respect to the backrest (3B),
The inner surface (α) on the seated person side of the left and right upper connecting portion (4U) of the protective device (4) is arranged inward from the outer surface (β) of the left and right side portions of the headrest (3C). Auxiliary seat for infants.   The protector (4) has a left and right upper connecting portion (4U) and a central lower connecting portion (4D) and is formed in a substantially Y shape in front view, and the left and right upper connecting portion (4U) is a headrest. (3C) The left and right upper support portions (5) provided at the lower portions of the left and right side portions are coupled to each other, and the lower coupling portion (4D) is provided with a lower mounting tool (7). The auxiliary seat for infants according to claim 1, wherein the seat is fixed to the seat side fixture (6) provided in the section (3A) so as to be detachable from the front side thereof. The headrest (3C) is supported so that the vertical position can be freely changed with respect to the backrest (3B),
The child auxiliary seat according to claim 2, wherein the lower mounting tool (7) of the protective device (4) is connected to the lower coupling portion (4D) so that the vertical position can be changed. The left and right upper connecting portions (4U) of the protective device (4) are connected to the left and right upper holding portions (5) so that the front and rear positions can be changed.
The child seat according to any one of claims 1 to 3, wherein the seat-side fixture (6) is connected to the seat (3A) so that the front-rear position can be changed.   The backrest part (3B) is provided with a headrest attachment mechanism (8), and the headrest attachment mechanism (8) is fixed to the backrest part (3B) with a headrest holding member (9) and the headrest holding member (9 And a headrest supporting member (10) for supporting the headrest (3C) so that the headrest (3C) can swing back and forth is provided on the upper portion of the headrest supporting member (10). Auxiliary seat for infants as described in the section.

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