JP2006182199A - Baggage basket co-using child riding together seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a baggage basket co-using a child riding together seat capable of adjusting an arrangement clearance of a sub-basket member relative to a main basket member according to growth and physique of a child in the state of the child riding together seat and being miniaturized in the baggage basket state. <P>SOLUTION: The baggage basket co-using child riding together seat 1 can change attitude to a baggage basket attitude P1 in which a front lower space 3 formed on the main basket member 2 is closed by the sub-basket member 4 and a basic seat attitude P2 in which the sub-basket member 4 is inclined to a front lower side relative to the main basket member 2 and a front wall 4a and a bottom wall 4b of the sub-basket member 4 are made to a foot placement part of the child. A slide mechanism 5 made to a stretching seat attitude P3 in which the sub-basket member 4 is further slid from the basic seat attitude P2 to a front lower side relative to the main basket member 2 is provided between the main basket member 2 and the sub-basket member 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a load-carrying child passenger seat used on a two-wheeled vehicle such as a bicycle.

Conventionally, as this kind of cargo bag combined child seat, the cargo bag is composed of a main rod member and a secondary rod member pivotally attached to the main rod member so as to tilt forward and downward via a hinge portion, A device is known in which the front side of the main saddle member is opened and the front side wall of the secondary saddle member is used as a child footrest (step part) when the secondary saddle member is tilted forward and downward ( For example, see Patent Document 1).
Japanese Patent Laid-Open No. 11-49058

However, in the conventional device, the dimensions of the main rod member and the auxiliary rod member are constant, and the child becomes cramped when the child becomes large.
In order to improve this point, it is conceivable that the size of one or both of the main rod member and the auxiliary rod member can be adjusted, but the growth of the child is larger in the vertical direction than in the horizontal direction, The child's sitting posture is such that the back and buttocks are in contact with the back inner surface and bottom surface of the main rod member, and both feet are put forward, and considering these points, the size of the main rod member and the auxiliary rod member should be adjusted It can be seen that it is more effective to make the distance between the two adjustable.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a load-carrying child passenger seat in which the arrangement interval of the auxiliary member relative to the main member can be adjusted in accordance with the growth and physique of the child in the state of the child passenger seat. .

In order to achieve the above object, the present invention provides a cargo posture in which the front lower space formed in the main rod member is closed by the auxiliary rod member, and the auxiliary rod member is tilted forward and downward with respect to the main rod member. A load-carrying child passenger seat that can be changed to a basic seat posture in which the front wall of the auxiliary rod member is a footrest portion of a child, wherein the basic seat is between the main rod member and the auxiliary rod member A slide mechanism is provided in which an extended seat posture is provided by sliding the auxiliary rod member further forward and downward relative to the main rod member from the posture.
According to the above configuration, when the child is small, the auxiliary rod member is used in the basic seat posture state, and when the child becomes large, the auxiliary rod member is slid further forward and downward from the basic seat posture by the slide mechanism. Thus, the child can be used by being extended to the extended seat posture, whereby the leg of the child can be extended for a long time and can be seated comfortably, and the feeling of cramping can be eliminated.

The slide mechanism includes: a slide base provided on a main rod member via a hinge portion; a slide guide that supports the auxiliary rod member so as to be slidable in the front-rear direction relative to the slide base; And a lock mechanism for restricting the sliding movement of the member.
According to the above configuration, the sliding movement of the auxiliary hook member relative to the slide base in the front-rear direction can be locked by the lock mechanism, and can be held in either the basic seat posture or the extended seat posture.

The lock mechanism includes a key shaft that is rotatably installed on the slide base, a first key hole formed in the auxiliary hook member, and a rotary movement within the first key hole for sliding movement of the auxiliary hook member. And a control blade provided on the key shaft to allow or prevent.
According to the above configuration, by rotating the key shaft, the control blade piece can be rotated in the first key hole to allow or prevent sliding movement of the auxiliary hook member.
The key shaft is provided with a key member that is engaged with a second key hole of a substantially L-shaped stay that is installed in a space below the front portion of the main rod member and holds the auxiliary rod member in a closed state. The member and the second key hole are characterized in that they can be locked and released by rotating the key shaft by a predetermined angle within the second key hole.

According to the above configuration, the control blade piece of the lock mechanism of the slide mechanism and the key member that holds the auxiliary hook member in the closed state with respect to the main hook member can be provided on the common key shaft, and the key shaft is operated. It is possible to perform an operation for switching the auxiliary saddle member to the closed state holding state and the closed release state for the main saddle member, and an operation to switch between the basic seat posture and the extended seat posture. Can be improved.
Between the key shaft and the slide base, there is provided a rotation direction positioning member for positioning the key shaft in the rotation direction at a rotation position for each predetermined angle of the key shaft.

According to the above configuration, the rotation position of the key shaft can be positioned and held for each predetermined angle, and thereby the position of the auxiliary hook member relative to the main hook member and the sliding position of the auxiliary hook member can be fixedly held. .
The key shaft is characterized in that the auxiliary rod member with respect to the main rod member can be locked and unlocked in a cargo posture, a basic seat posture, and an extended seat posture by a turning operation.
According to the above configuration, the locking and unlocking operations can be easily performed with one touch at one place, and the configuration is also simplified.

  According to the present invention, in the state of a child passenger seat, it is possible to adjust the arrangement interval of the auxiliary member with respect to the main member according to the growth and physique of the child, and to make the child passenger seat shared with a cargo bag that can be compacted in the cargo state Can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the cargo passenger / child passenger seat 1 according to the present invention includes a cargo posture P <b> 1 in which the front lower space 3 formed in the main rod member 2 is closed by the auxiliary rod member 4, and the main rod member 2. With respect to the main saddle member 2, the secondary saddle member 4 is tilted forward and downward so that the posture can be changed to a basic seat posture P2 in which the front wall 4a of the secondary saddle member 4 is a footrest portion of a child. A sliding mechanism 5 is provided between the secondary saddle member 4 and an extended seat posture P3 in which the secondary saddle member 4 is further slid forward and downward with respect to the main saddle member 2 from the basic seat posture P2.

As shown in FIG. 3, the main rod member 2 has a substantially rectangular container shape surrounded by a front wall 2a, a rear wall 2b, left and right side walls 2c, 2c, a bottom wall 2d at the bottom, and an open top. There is no. And the front lower space 3 is formed by using the lower part of the front wall 2a, the front lower part of the left and right side walls 2c, 2c and the substantially front half part of the bottom wall 2d as a notch part.
As shown in FIGS. 1 and 3, the left and right side walls 2 c and 2 c have longitudinal fitting grooves 2 e and 2 e that are fitted and attached to a rising portion (not shown) of a bicycle handlebar. The mesh portions 2f and 2f are formed before and after that.

Further, as shown in FIG. 1, attachment portions 2g and 2g of a child handle (not shown) gripped by a seated child are formed on the upper ends of the left and right side walls 2c and 2c near the front portion. The guide part 7 which mounts the headrest 6 so that height adjustment is possible is formed in the vertical direction.
In the front lower space 3 of the main rod member 2, as shown in FIGS. 1 to 3, a substantially L-shaped stay 8 is seen from the lower end portion of the front wall 2a to the front end portion of the bottom wall 2d in a side view. It is erected in the center in the left-right direction.
As shown in FIGS. 1 and 3, the bottom wall 2 d is appropriately formed with a mounting hole 2 h for placing the main rod member 2 on a bicycle handle stem (not shown) and fixing with a mounting bracket. .

Further, as shown in FIGS. 2, 3, and 6B, a hinge mounting portion 9 is formed at the front end of the bottom wall 2d, and the auxiliary hook member 4 is opened at a position immediately after the hinge mounting portion 9. A stopper surface 10 that regulates the angle α is integrally formed.
As shown in FIG. 1 and FIG. 4 (A), the auxiliary saddle member 4 has a front wall 4a, a bottom wall 4b, left and right side walls 4c, 4c having a size and shape capable of closing the front lower space 3 of the main cage member 2. Reinforcing ribs 4d are formed from the front wall 4a to the bottom wall 4b at appropriate intervals in the left-right direction, and the boundary between the front wall 4a and the bottom wall 4b is shown in FIG. As shown, drain holes 4e are formed corresponding to the positions where the reinforcing ribs 4d are formed. The drain hole 4e is hidden by the reinforcing rib 4d so as not to be directly visible from above.

As shown in FIG. 2, the slide mechanism 5 includes a slide base 13 in which a hinge portion 11 is pivotally attached to a hinge mounting portion 9 of the main rod member 2 by a hinge pin 12, and the auxiliary rod member 4 is attached to the slide base 13. Slide guides 14 and 14 (see FIG. 8) that are supported so as to be slidable in the front-rear direction, and a lock mechanism 15 that restricts the sliding movement of the auxiliary saddle member 4 relative to the slide base 13 are provided.
As shown in FIGS. 2, 5 (A), and 6 (A), the slide base 13 has a substantially rectangular plate shape that substantially compensates for the bottom wall notch in the front half of the bottom wall 2 d of the main rod member 2. The left and right ends of the front part of the plate shape are arcuate. In addition, a hinge portion 11 is provided at the center of the rear end portion of the slide base 13 so as to protrude rearward. The hinge portion 11 is formed with an insertion hole 11a of a hinge pin 12 penetrating in the left-right direction. Yes.

As shown in FIGS. 5A and 5B, the slide guides 14 and 14 are provided with guide grooves 14a and 14a formed on the left and right sides of the slide base 13 and guide pins 16 and 16 fitted to the guide grooves 14 and 14, respectively. The guide grooves 14a, 14a are formed in the slide base 13 as long holes extending in the front-rear direction. The guide pins 16, 16 are suspended from the bottom wall 4 b of the auxiliary saddle member 4. The length of the guide grooves 14 a and 14 a in the front-rear direction is a length corresponding to the slide movement distance L in the front-rear direction of the auxiliary flange member 4 with respect to the slide base 13.
As shown in FIG. 2, the lock mechanism 15 includes a key shaft 17 that is rotatably installed on the slide base 13, a first key hole 18 that is formed in the auxiliary brim member 4, and an inside of the first key hole 18. And a control wing piece 19 provided on the key shaft 17 so as to allow or prevent the sliding movement of the auxiliary hook member 4 by rotating at the same time.

As shown in FIGS. 2, 5A and 6A, a concave portion 13a extending in the front-rear direction is formed on the upper surface of the center portion of the slide base 13 in the left-right direction. Is formed with a circular through-hole 13b through which the key shaft 17 is rotatably inserted.
Note that a stopper portion 13 c is formed on the lower surface of the rear end portion of the slide base 13. The stopper portion 13c is formed at the front end of the bottom wall 2d of the main rod member 2 when the slide base 13 is tilted forward and downward about the hinge pin 12, as indicated by a chain line in FIG. 10 to hold the auxiliary saddle member 4 in the basic seat posture P2. In the illustrated example, the stopper portion 13c is formed in a reinforcing rib shape at appropriate intervals in the left-right direction of the slide base 13, but is not limited to this shape, and may be a block shape.

  The recess 13 a of the slide base 13 corresponds to the first keyhole 18. As shown in FIGS. 4 (A), 5 (B), and 7 (B), the first keyhole 18 includes two circular peripheral walls 18a and 18b that project from the bottom surface of the bottom wall 4d of the auxiliary saddle member 4. The two circular peripheral walls 18a and 18b are surrounded by linear peripheral walls 18c and 18c. The two circular peripheral walls 18 a and 18 b are formed to be separated from each other by the sliding movement distance in the front-rear direction of the auxiliary saddle member 4. The width interval between the linear peripheral walls 18c, 18c connecting the two circular peripheral walls 18a, 18b is formed smaller than the diameter of the circular peripheral walls 18a, 18b. Between the central portions of these two circular peripheral walls 18a and 18b, a long hole 18d having a width smaller than the width interval between the linear peripheral walls 18c and 18c is formed.

The key shaft 17 is inserted through the long hole 18d. A control blade 19 is rotatably accommodated in the first keyhole 18 surrounded by the circular peripheral walls 18a and 18b. As shown in FIGS. 10 (A) to 10 (C), the control blade piece 19 is composed of a substantially oval plate piece in a plan view made up of the long side portions 19a and 19a and the short side portions 19b and 19b. A square hole 19c is formed in the center.
As shown in FIG. 7B, the control blade piece 19 makes the direction of the long side portions 19a and 19a (major diameter direction) orthogonal to the sliding movement direction in the circular peripheral walls 18a and 18b as shown by the two-dot chain line. Then, relative movement of the control blade piece 19 and the circular peripheral walls 18a and 18b in the sliding direction is prevented. Further, when the direction of the long side portions 19a and 19a is made to coincide with the sliding movement direction in the circular peripheral walls 18a and 18b as shown by the alternate long and short dash line, the relative direction in the sliding direction between the control blade 19 and the circular peripheral walls 18a and 18b The movement is allowed, and the short sides 19b and 19b of the control blade 19 can freely pass between the straight peripheral walls 18c and 18c.

With the above structure, the slide base 13 can be prevented or allowed to slide with respect to the slide base 13.
As shown in FIGS. 9A to 9E, the key shaft 17 has a substantially oval key member 17a in a plan view at the upper end, and a large-diameter cylindrical portion 17b is formed below the key member 17a. A small-diameter cylindrical portion 17c is formed in the lower portion, and a small-diameter rectangular tube portion 17d is further formed in the lower portion.
The large diameter cylindrical portion 17b has the same diameter as the short diameter portion of the key member 17a. The small-diameter cylindrical portion 17c has the same diameter as the elongated hole 18d of the auxiliary member 4, and is fitted in the elongated hole 18d so as to be rotatable and relatively movable in the sliding direction. Furthermore, the small-diameter rectangular tube portion 17d has the same diameter as the square hole 19c of the control blade piece 19, and is fitted to the square hole 19c so as to be integrally rotatable. Convex portions 19 d and convex portions 17 e are formed on the inner peripheral surface of the square hole 19 c of the control blade piece 19 and the outer peripheral surface of the small-diameter rectangular tube portion 17 d of the key shaft 17. The fitting phase of the control blade piece 19 with respect to is uniquely determined. For example, in the illustrated example, the case where the major axis direction of the key member 17a and the major axis direction of the control blade piece 19 coincide with each other is shown, but they may be orthogonal to each other.

The key member 17a at the upper end of the key shaft 17 is engaged with the second key hole 20 of the substantially L-shaped stay 8 installed in the front lower space 3 of the main rod member 2 to hold the auxiliary rod member 4 in a closed state. It is provided for. The second keyhole 20 has a circular recess 20a having a diameter larger than that of the key member 17a and a through-hole 20b formed through the center of the circular recess 20a in the vertical direction. The through hole 20b is substantially oval in plan view, and has the same shape as the key member 17a or slightly larger.
With the above structure, the key member 17a and the second key hole 20 are rotated by rotating the key shaft 17 approximately 90 degrees within the circular recess 20a of the second key hole 20, as shown in FIG. When the major axis direction of the key member 17a is orthogonal to the major axis direction of the through hole 20b of the recess 20a, the key member 17a can be locked, and when both major axis directions coincide with each other, the key member 17a can be detached.

  A rotation direction positioning member 21 for positioning the key shaft 17 in the rotation direction at a rotation position of approximately 90 degrees is fitted to the small-diameter rectangular tube portion 17d of the key shaft 17 as shown in FIG. Yes. As shown in FIGS. 11A to 11C, the rotational direction positioning member 21 includes a central boss portion 21a, and a disk portion 21b formed to project outward from the central boss portion 21a in the radial direction. The disc portion 21b is formed of a cross arm portion 21d which is cut in a cross direction in the cross direction so as to be easily elastically deformed, and a positioning convex portion 21e is formed on the upper surface of the distal end portion of the cross arm portion 21d. Corresponding to the positioning projection 21e, a positioning recess 13d is formed around the lower surface of the through hole 13b of the slide base 13 as shown in FIGS. 5 (A) and 6 (A).

The outer diameter of the central boss portion 21 a is the same as or slightly smaller than the through hole 13 b of the slide base 13. A square hole 21f is formed at the center of the central boss 21a, and a small-diameter circular hole 21g is formed at the center of the square hole 21f.
As shown in FIG. 2, the key shaft 17 is inserted from above into the elongated hole 18d of the auxiliary hook member 4, and then the control blade piece 19 is fitted into the rectangular tube portion 17d of the key shaft 17, in this state. The key shaft 17 is inserted into the through-hole 13b of the slide base 13, and then the rotational direction positioning member 21 is fitted from below into the rectangular tube portion 17d of the key shaft 17. At this time, the rotational direction positioning member 21 The outer peripheral portion of the center boss portion 21 a is fitted into the through hole 13 b of the slide base 13. Finally, the tightening bolt 22 is inserted into the center hole 17 f of the key shaft 17, and a tightening nut is attached to the lower end of the tightening bolt 22. 23 is attached via a rubber washer 24 and the whole is tightened and fixed.

The embodiment of the child passenger seat for cargo handling according to the present invention has the above-described configuration. Next, the overall operation will be described.
When used as a cargo bag, as shown by the solid lines in FIGS. 1 and 2, the auxiliary hook member 4 is lifted to close the front lower space 3 of the main hook member 2, and the key shaft 17 is rotated. When the major axis direction of the upper key member 17a is orthogonal to the major axis direction of the through hole 20b in the circular recess 20a of the second key hole 20 of the substantially L-shaped stay 8, as shown in FIG. The key member 17a is locked in the circular recess 20a, and holds the closed state of the auxiliary hook member 4. The rotational direction position of the key shaft 17 at this time is held in a fixed state by fitting the positioning convex part 21e at the tip of the cross arm part 21d of the rotational direction positioning member 21 into the positioning concave part 13d of the slide base 13. As a result, the key shaft 17 does not rotate even when a traveling vibration of the bicycle is transmitted during use as a cargo bag, and the closed state of the auxiliary rod member 4 is maintained.

Next, when used as a child passenger seat, the key shaft 17 is rotated 90 degrees so that the major axis direction of the key member 17 a coincides with the major axis direction of the through hole 20 b of the second key hole 20 of the substantially L-shaped stay 8. Let As a result, the key member 17a can be detached from the through hole 20b of the second key hole 20, the auxiliary hook member 4 is rotated integrally with the slide base 13 by its own weight around the hinge pin 12, and the stopper portion 13c is the stopper. It abuts against the surface 10 and is held in the chain line state of FIGS. 1 and 2, that is, the basic seat posture P2.
At this time, if the major axis direction of the key member 17 a of the key shaft 17 and the major axis direction of the control blade piece 19 are set in an orthogonal relationship, the control blade piece 19 causes the secondary hook member 4 to slide relative to the slide base 13. It can be in a blocking state. In the case where the major axis direction of the through hole 20b of the second key hole 20 is set in a direction orthogonal to the sliding direction of the auxiliary hook member 4, the major axis direction of the key member 17a of the key shaft 17 and the major axis direction of the control blade piece 19 are By making them coincide, the same relationship as described above can be formed.

  While the child is small, the basic seat posture P2 is used as it is. However, when the child grows larger, the key shaft 17 is rotated 90 degrees so as to make the extension seat posture P3, so that the major axis direction of the control blade 19 coincides (parallel) with the slide direction. Accordingly, the prevention of the sliding movement of the auxiliary hook member 4 by the control blade piece 19 and the first key hole 18 is released, and the auxiliary hook member 4 can be pulled forward from the slide base 13 to be in the extended seat posture P3. In this state, by rotating the key shaft 17 by 90 degrees, the control blade piece 19 is in a state in which the major axis direction is orthogonal to the sliding direction in the front circular peripheral wall 18b and the sliding movement of the auxiliary hook member 4 is prevented. Become. The key shaft 17 is positioned and held by the rotation direction positioning member 21, and the key shaft 17 is not rotated by a traveling vibration of the bicycle or the like, and the auxiliary saddle member 4 can be stably held in the extended seat posture P3.

When used as cargo, the key shaft 17 is rotated 90 degrees to push the auxiliary hook member 4 backward to return to the basic seat posture P2, and the key shaft 17 is rotated 90 degrees to rotate the auxiliary hook member 4 In this state, sliding movement is prevented, and the auxiliary hook member 4 is rotated upward to allow the key member 17a to pass through the through hole 20b of the second key hole 20 of the substantially L-shaped stay 8. In this state, the key shaft 17 is moved to 90 °. Just rotate it. Thereby, the auxiliary hook member 4 will be in the state which closed the front lower space 3 of the main hook member 2, and will be in the cargo handling attitude | position P1.
As described above, the key shaft 17 passes through both the first key hole 18 and the second key hole 20, and the lock state that holds the cargo posture by the rotation operation of the key shaft 17, and the auxiliary hook member Either the locked state in which the basic seat posture is tilted and the locked state in which the extended seat posture in which the auxiliary member is slid forward is maintained. In addition, the key member 17a of the key shaft 17 can play a role as an operation handle in addition to the role of engaging with the second key hole 20.

  The embodiment of the present invention has the above-described configuration and operation. However, the present invention is not limited to this embodiment, and can be freely changed within the scope described in the claims. You may implement. For example, as shown in FIG. 12, the first key hole 18 of the lock mechanism 15 may be provided with three circular peripheral walls so that the extension of the auxiliary hook member 4 to the front can be adjusted in two stages. Moreover, it is good also as multistage adjustment possible. Furthermore, the main rod member may be applied to a structure in which the front part is fully open. In addition, the main rod member 2, the auxiliary rod member 4, the slide base 13, the key shaft 17, the control blade piece 19, and the rotation direction positioning member 21 are made of resin, but may be made of other materials.

It is a side view of the child passenger's boarding seat for cargo handling according to the present invention. It is a principal part expansion vertical side view which shows the detail of the attachment part of a main rod member and a sub-claw member. It is a top view of a main rod member. (A) is a vertical side view of the auxiliary saddle member, and (B) is a cross-sectional view taken along line BB of (A). (A) is a plan view of the slide base, and (B) is a plan view of the auxiliary saddle member. (A) is a longitudinal side view of the slide base, and (B) is an enlarged longitudinal side view of the main rod member near the substantially L-shaped stay portion. (A) is a top view which shows the relationship between the 1st keyhole of a substantially L-shaped stay, and the key member of a key shaft, (B) is the bottom face which shows the relationship between the 2nd keyhole of the locking mechanism of a sub-ring member, and a control blade FIG. It is a vertical side view in the slide guide part of a slide base and an auxiliary hook member. (A) is a plan view of the key shaft, (B) and (C) are a side view and a front view of the key shaft, and the left half is shown in a vertical section. (D) is a bottom view of the key shaft, and (E) is an EE cross-sectional view of (C). (A) is a plan view of the control blade piece, (B) is a longitudinal side view thereof, and (C) is a front view thereof. (A) is a top view of a rotation direction positioning member, (B) is the side view, and the right half is shown by the longitudinal section. (C) is a partial bottom view thereof. It is a bottom view which shows another embodiment of the 1st keyhole of the locking mechanism of an auxiliary member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Child's shared passenger seat 2 Main part member 3 Front part lower space 4 Sub part member 5 Slide mechanism 6 Headrest 7 Guide part 8 Substantially L-shaped stay 9 Hinge attachment part 10 Stopper surface 11 Hinge part 12 Hinge pin 13 Slide base 14 Slide Guide 15 Lock mechanism 16 Guide pin 17 Key shaft 18 First key hole 19 Control blade piece 20 Second key hole 21 Rotating direction positioning member 22 Tightening bolt 23 Tightening nut

Claims (6)

A loading posture in which the front lower space formed in the main rod member is closed by the auxiliary rod member, and the auxiliary rib member is tilted forward and downward with respect to the main rod member, and the front wall of the auxiliary rod member is placed on the child's foot. A child-seat passenger seat that can change the posture to the basic seat posture that is a part,
A slide mechanism is provided between the main saddle member and the secondary saddle member so that the secondary saddle member slides further forward and downward relative to the primary saddle member from the basic seat posture. Cargo and children's seat.   The slide mechanism includes: a slide base provided on a main rod member via a hinge portion; a slide guide that supports the auxiliary rod member so as to be slidable in the front-rear direction relative to the slide base; The child passenger's seat for both cargo handling according to claim 1, further comprising a lock mechanism for restricting sliding movement of the member.   The lock mechanism includes a key shaft that is rotatably installed on the slide base, a first key hole formed in the auxiliary hook member, and a rotary movement within the first key hole for sliding movement of the auxiliary hook member. The child's passenger seat for cargo handling as claimed in claim 2, further comprising a control wing piece provided on the key shaft to allow or block.   The key shaft is provided with a key member that is engaged with a second key hole of a substantially L-shaped stay that is installed in a space below the front portion of the main rod member and holds the auxiliary rod member in a closed state. The member and the second keyhole can be locked and disengaged by rotating the key shaft by a predetermined angle within the second keyhole. .   4. A rotation direction positioning member is provided between the key shaft and the slide base to position the key shaft in the rotation direction at a rotation position for each predetermined angle of the key shaft. Or the cargo passenger combined seat as described in 4.   6. The key shaft is capable of locking and unlocking a loading posture, a basic seat posture, and an extended seat posture of a secondary rod member with respect to a main rod member by a turning operation. Children's seat for both cargo and luggage as described in any of the above.

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