Seat system and seat holder for said seat system

Abstract

A seat system according to the present invention is provided with: a seat part having a seat body on which a child can sit and an attachment / detachment part provided to the bottom of the seat body; a bracket configured to be fixed to a vehicle and on which the seat part is placed; the seat mounting and dismounting device is characterized in that the seat mounting and dismounting device comprises a bracket which is provided in a vehicle, and a seat holder which is provided in a predetermined position other than the vehicle and on which the seat part is mounted, and the bracket is provided with a bracket mounting part which is configured so as to engage with the mounting and dismounting part of the seat part in a state in which the bracket is mounted; the seat holder is provided with a holder mounting part, and the holder mounting part is configured so as to engage with the attachment / detachment part of the seat part in a state in which the seat part is mounted on the seat holder.

Description

Technical Field

[0001] The present invention relates to a seat system having a seat for a child to sit on and a seat holder used for the seat system. Background Art

[0002] Conventionally, as a seat system, there is known a child seat system described in Patent Document 1. The child seat system comprises: a base module firmly mounted on a base area of ​​a vehicle; and an infant seat frame that can be connected to and separated from the base module and on which a child can sit, and the weight of the infant seat frame is less than 4 kg.

[0003] With the child seat system as described above, the infant seat frame can be connected to and separated from the base module, and weighs less than 4 kg, which facilitates carrying the infant seat frame outside the car for use.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application No. 2020-536804 Summary of the invention

[0007] Technical problem to be solved by the invention

[0008] In the child seat system described in Patent Document 1, it is difficult for a user to understand how to install the infant seat frame separated from the base module at a predetermined position.

[0009] Therefore, an object of the present invention is to provide a seat system and a seat retainer used in the seat system, which can easily understand how to set a seat portion removed from a bracket to a predetermined position.

[0010] Solutions for solving technical problems

[0011] The seat system of the present invention comprises: a seat portion, having a seat body on which a child can sit and an assembly and detachment portion arranged at the bottom of the seat body; a bracket, which is configured to be fixed to a vehicle and for carrying the seat portion; and a seat retainer, which is arranged at a specified position outside the vehicle and for carrying the seat portion, the bracket comprising a bracket loading portion, the bracket loading portion being configured to engage with the assembly and detachment portion of the seat portion in a state in which the child is placed on the bracket, and the seat retainer comprising a retainer loading portion, the retainer loading portion being configured to engage with the assembly and detachment portion of the seat portion in a state in which the child is placed on the seat retainer.

[0012] In addition, the seat retainer of the present invention is a seat retainer used for the seat system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of a seat portion provided on a bracket in a seat system according to an embodiment of the present invention.

[0014] Figure 2 It is a side view of a seat part arranged on a bracket of the same seat system.

[0015] Figure 3 It is a figure which shows the rotation of a seat part.

[0016] Figure 4 It is a perspective view showing the bottom surface of the seat part.

[0017] Figure 5 It is a bottom view of the seat portion.

[0018] Figure 6 It is a three-dimensional diagram of the bracket involved in the same seat system.

[0019] Figure 7 It is a figure which shows the relationship between the seat part and the bracket in the fixed position.

[0020] Figure 8 It is a figure which shows the relationship between the seat part and the bracket in the attachment and detachment position.

[0021] Fig. 9 The present invention is a perspective view showing a seat retainer related to the seat system.

[0022] Fig.10 is a top view of the seat retainer.

[0023] Fig.11 It is a side view showing a state where the seat portion is placed on the seat retainer.

[0024] Fig.12 yes Fig.10 An enlarged view of section XII-XII is shown.

[0025] Fig.13 It is a side view showing a seat retainer related to a seat system according to another embodiment of the present invention.

[0026] Fig.14 is a top view of the same seat retainer.

[0027] Fig.15 It is a side view showing a seat retainer related to a seat system according to another embodiment of the present invention.

[0028] Fig.16 is a top view of the same seat retainer.

[0029] Fig.17It is a perspective view showing a seat retainer related to a seat system according to still another embodiment of the present invention.

[0030] Fig.18 is a side view of the same seat holder. DETAILED DESCRIPTION

[0031] Reference Figures 1 to 12 The seat system according to one embodiment of the present invention is described below. Figure 1 and Figure 2 The illustrated direction of the seat portion 1 is used as a reference for description.

[0032] like Figure 1 and Fig.11 As shown, the seat system comprises: a seat portion 1 on which a child can sit, a bracket (first retainer) 3 fixed to a vehicle V, and a seat retainer (second retainer) 5 arranged at a specified location outside the vehicle V (for example, inside a building), and the seat can be placed on both the bracket (first retainer) 3 and the seat retainer (second retainer).

[0033] like Figures 1 to 5 As shown in FIG. 1 , the seat portion 1 includes a seat body 11 on which a child can sit, and a detachable portion 2 provided at the bottom of the seat body 11. The seat body 11 includes a seat seat 13 facing the buttocks of the child sitting thereon, and a seat back 12 facing the back of the child sitting thereon. The distance from the connecting portion 11a between the seat seat 13 and the seat back 12 to the end of the seat back 12 on the opposite side to the connecting portion 11a is longer than the distance from the connecting portion 11a between the seat seat 13 and the seat back 12 to the end of the seat seat 13 on the opposite side to the connecting portion 11a. The seat body 11 includes an outer shell 14 constituting an outer shell 14 of the seat body 11, and a cushion portion (not shown) provided on the inner side of the seat body 11 relative to the outer shell 14 and arranged between the outer shell 14 and the passenger. The cushion portion can be appropriately selected according to the physique of the child sitting thereon, etc. In addition, the inner side of the seat portion 1 refers to the side on which the child sits, and the outer side of the seat portion 1 refers to the side opposite to the side on which the child sits thereon.

[0034] The housing 14 includes: a bottom wall portion 15 constituting the outer surface of the seat seat portion 13; a side wall portion 16 extending upward from the bottom wall portion 15 and constituting the outer surface of the seat back 12; and a pair of transverse wall portions 17 extending from the bottom wall portion 15 and the side wall portion 16 toward the inner side of the seat portion 1. In addition, the housing 14 includes a handle 18 for a carrier to hold when carrying the seat body 11. The handle 18 of this embodiment is provided with a pair of handles 18 at the ends of the transverse wall portion 17. In addition, the handle 18 is provided with an installation and removal operation portion 19 for operating the anti-detachment protrusion 24 described later. The installation and removal operation portion 19 is configured so that the installation and removal operation portion 19 is pressed when the carrier holds the handle 18.

[0035] The seat portion 1 of this embodiment can be switched to Figure 3 The solid line in the middle shows the upright state 1A and Figure 3 In the tilted state 1B shown by the double-dashed line, in the upright state 1A, the upright angle of the back relative to the setting surface is large, and in the tilted state 1B, the upright angle of the back relative to the setting surface is small compared to the upright state 1A. Specifically, the seat portion 1 is mounted on the bracket (first retainer) 3, and is rotated around the rotation axis R extending in the inclined direction relative to the setting surface as the axis center, thereby switching between the upright state 1A and the tilted state 1B. In this embodiment, the rotation axis R of the seat portion 1 is orthogonal to the bottom surface of the mounting and disassembly portion 2, and extends through the mounting and disassembly central portion 2C described later. In addition, the seat portion 1 in the upright state 1A is a state in which the front end portion 13a of the seat seat portion 13 in the seat body 11 is located at the bottom, and the seat portion 1 in the tilted state 1B is a state in which the connecting portion 11a of the seat back 12 and the seat seat portion 13 in the seat body 11 is located at the bottom.

[0036] like Figure 4 and Figure 5As shown, the attachment and detachment portion 2 is a portion provided at the bottom of the seat body 11, and in the present embodiment, is a portion protruding downward from the bottom wall portion 15. Specifically, the attachment and detachment portion 2 includes: a cylindrical attachment and detachment tube portion 21 configured to protrude downward from the bottom of the seat body 11; an attachment and detachment protrusion 22 provided inside the attachment and detachment tube portion 21 and protruding downward from the bottom wall portion 15; a plurality of anti-detachment claws 23 extending radially inward from the attachment and detachment tube portion 21; a plurality of anti-detachment protrusions 24 protruding and retracting radially outward from the attachment and detachment protrusion 22 and being engaged with the bracket (first retainer) 3 in the protruding state; a rotation limiting mechanism 25 engaged with the bracket (first retainer) 3 to limit the rotation of the seat body 11 relative to the bracket (first retainer) 3; and an engagement notch 26 into which the positioning portion 642 of the seat retainer (second retainer) 5 described later is engaged. The mounting and disassembly tube 21 is a cylindrical body, and is arranged in a manner that the protruding distance from the bottom wall 15 is approximately uniform. In the present embodiment, it is cylindrical. In addition, the mounting and disassembly section 2 is configured so that the axis of the mounting and disassembly tube 21 is located in the center of the mounting and disassembly section 2 in the bottom surface of the seat section 1, that is, the mounting and disassembly center section 2C. Moreover, the seat section 1 rotates relative to the bracket (first retainer) 3 with the axis of the mounting and disassembly tube 21 as the rotation axis R. The fitting notch 26 is arranged only on one side ( Figure 4 and Figure 5 An upward recessed cutout on the front side of the body (shown).

[0037] The mounting and disassembly protrusion 22 is a columnar portion extending downward from the bottom wall portion 15, and is cylindrical in the present embodiment. In addition, the mounting and disassembly protrusion 22 is a columnar body coaxially arranged with the mounting and disassembly cylinder portion 21. Moreover, the mounting and disassembly protrusion 22 is arranged so that its outer peripheral surface is separated radially inward relative to the mounting and disassembly cylinder portion 21 and the anti-separation claw 23. Specifically, the mounting and disassembly protrusion 22 has a shaft fitting portion 221 that is fitted with the connecting shaft 44 of the bracket (first retainer) 3. In addition, a mechanism (mounting and disassembly operation transmission portion 223) for switching the protruding and retracting state of the anti-separation protrusion 24 described later is built into the mounting and disassembly protrusion 22. The shaft fitting portion 221 is a portion that is recessed upward and is arranged at a position corresponding to the mounting and disassembly central portion 2C.

[0038] The anti-separation claw 23 is a claw extending radially inward from the mounting and disassembly cylinder 21, and a plurality of claws are provided in this embodiment. The anti-separation claw 23 is a claw disposed at a position separated from the bottom wall 15, and a space is formed between the anti-separation claw 23 and the bottom wall 15. In this embodiment, four anti-separation claws 23 are provided, two of which are disposed on one side in the radial direction ( Figure 4 and Figure 5 The front claw portion 23f is arranged on the front side of the radial direction ( Figure 4 and Figure 5 The rear claw portion 23r (shown as the rear side) is provided.

[0039] The anti-separation protrusion 24 is a protrusion protruding radially outward from the mounting and disassembly convex portion 22. In the present embodiment, a plurality of anti-separation protrusions 24 are provided at intervals in the circumferential direction of the mounting and disassembly convex portion 22. The anti-separation protrusion 24 is a protrusion disposed at a position separated from the bottom wall portion 15, and a space is formed between the anti-separation protrusion 24 and the bottom wall portion 15. The anti-separation protrusion 24 of the present embodiment is provided in a pair approximately 180 degrees apart in the circumferential direction. In addition, the pair of anti-separation protrusions 24 are configured to be switchable between a protruding state 24A protruding radially outward from the mounting and disassembly convex portion 22 and a retreat state 24B retreating to the inside of the mounting and disassembly convex portion 22. Specifically, the pair of anti-separation protrusions 24 are pressed radially outward in a manner of becoming the protruding state 24A when not subjected to external force. In addition, when the installation and disassembly operating part 19 is pressed, the pressing force will be transmitted to the pair of anti-separation protrusions 24 via the installation and disassembly operating transmission part 223 connecting the installation and disassembly operating part 19 and the pair of anti-separation protrusions 24. The pair of anti-separation protrusions 24 resist the elastic force and move radially inward and retreat to the inside of the installation and disassembly protrusion 22.

[0040] The rotation restricting mechanism 25 includes: a rotation restricting protrusion 251 which is provided to be able to protrude and retract relative to the bracket (first retainer) 3, and is locked to the bracket (first retainer) 3 in the protruding state 24A to restrict the rotation of the seat body 11 relative to the bracket (first retainer) 3; and a rotation operation portion 252 which performs an operation to retract the rotation restricting protrusion 251 relative to the bracket (first retainer) 3. Specifically, the rotation restricting protrusion 251 can be switched between a rotation restricting state and a rotation allowing state. In the rotation restricting state, the rotation restricting protrusion 251 protrudes downward from the bottom wall portion 15 and is locked to the bracket (first retainer) 3. In the rotation allowing state, the rotation restricting protrusion 251 retracts upward from the bottom wall portion 15 and releases the locking of the bracket (first retainer) 3. The rotation operation portion 252 is an operation lever arranged on the seat portion 1. In the present embodiment, the rotation operation portion 252 is arranged at the front end portion of the seat portion 1 in the standing state 1A. In addition, the rotation limiting protrusion 251 is biased downward to enter the rotation limiting state. When the operating lever of the rotation operating part 252 is operated, the force generated by the operation acts on the rotation limiting protrusion 251, causing the rotation limiting protrusion 251 to resist the elastic force and move upward to enter the rotation allowing state.

[0041] like Figure 3As shown, the bracket (first retainer) 3 is a part fixed to the vehicle V, and the seat part 1 can be placed in the state of being fixed to the vehicle V. The bracket (first retainer) 3 of this embodiment is fixed to the automobile as the vehicle V. In addition, the bracket (first retainer) 3 is provided with a mounting member 34, and the mounting member 34 can be fixed to the fixing member corresponding to the International Standards Organization FIX (ISOFIX) method provided in the vehicle V, but is not limited to this structure. In addition, the bracket (first retainer) 3 can fix the seat part 1 placed thereon so that it will not be separated from the bracket (first retainer) 3 even if the vehicle V shakes or the children sitting thereon move.

[0042] like Figure 6 As shown, the bracket (first holder) 3 includes: a base 31 fixed to the vehicle V; and a bracket placement portion (first placement portion) 4 arranged on the upper surface of the base 31 and on which the seat portion 1 is placed. The base 31 includes: a base body 32 provided on the seat of the vehicle V; a support leg 33 provided at the front end of the base body 32 and extending to the floor of the vehicle V supporting the seat of the vehicle V; and a mounting member 34 for fixing the bracket (first holder) 3 to the vehicle V. Such a bracket (first holder) 3 is supported by the support leg 33 and the mounting member 34, thereby being provided in a stable state relative to the vehicle V, but the present invention is not limited to this structure, and a structure in which the bracket (first holder) 3 is fixed to the vehicle V by using other components such as the seat belt of the vehicle V can also be adopted. When such a structure is adopted, a structure without the support leg 33 or a structure without the mounting member 34 can also be adopted. The bracket placement portion (first placement portion) 4 of the present embodiment is movable in the front-rear direction relative to the base portion 31 by a slide mechanism (not shown).

[0043] The bracket loading part (first loading part) 4 includes: a bottom support part 41 facing the bottom surface of the mounting and disassembling part 2; a receiving tube part 42 extending upward from the bottom support part 41 in a cylindrical shape and capable of accommodating the mounting and disassembling part 2 inside; a locking protrusion 43 arranged inside the receiving tube part 42 and arranged to protrude upward relative to the bottom support part 41; and a connecting shaft 44 protruding upward from the bottom support part 41. The bottom support part 41 is a part constituting the bottom surface of the bracket loading part (first loading part) 4, and in the present embodiment, it is a plate-like body with a flat upper surface. Such a bracket loading part (first loading part) 4 can be engaged with the mounting and disassembling part 2 of the seat part 1 placed thereon, and in the engaged state, the bracket loading part (first loading part) 4 and the mounting and disassembling part 2 can maintain a combined state even if the vehicle V is shaken, the children riding thereon move, etc.

[0044] The receiving tube portion 42 is a cylindrical body configured to extend upward from the outer edge portion of the base portion 41, and in the present embodiment, it is a cylindrical body coaxial with the connecting shaft 44. In addition, the receiving tube portion 42 is a cylindrical body whose inner diameter is larger than the outer diameter of the mounting and disassembling tube portion 21. That is, the receiving tube portion 42 of the present embodiment can accommodate the entire mounting and disassembling portion 2 inside. Moreover, the receiving tube portion 42 is a cylindrical body whose length protruding from the base portion 41 is smaller than the length of the mounting and disassembling tube portion 21 protruding from the bottom wall portion 15. Due to such a structure, when the mounting and disassembling portion 2 is accommodated inside the receiving tube portion 42, the bottom surface of the mounting and disassembling portion 2 can reliably abut against the base portion 41.

[0045] The locking protrusion 43 is configured to be separated from the receiving tube portion 42 toward the radial inside and is provided as a protrusion protruding upward from the bottom support portion 41. In addition, the locking protrusion 43 is cylindrical and can accommodate the mounting and disassembly protrusion 22 inside. Specifically, the locking protrusion 43 includes: a cylindrical protrusion body 431 that can accommodate the mounting and disassembly protrusion 22 inside; an inner flange portion 432 that is provided to protrude radially inward from the inner peripheral surface of the protrusion body 431; an outer flange portion 433 that is provided to protrude radially outward from the outer peripheral surface of the protrusion body 431; and a rotation limiting recess 434 that is formed in a manner of being recessed from the upper surface to the bottom. The locking protrusion 43 of this embodiment is cylindrical and is configured to be coaxial with the connecting shaft 44.

[0046] The inner flange portion 432 is a flange-shaped portion provided in a manner protruding radially inward from the upper end surface of the locking protrusion 43. In the present embodiment, the inner flange portion 432 is arranged to surround the inner circumferential surface of the locking protrusion 43. In addition, the inner flange portion 432 is arranged so that its lower surface is separated upward from the bottom support portion 41 to such an extent that the anti-detachment protrusion 24 can be located between the inner flange portion 432 and the bottom support portion 41. The length of the inner flange portion 432 protruding radially inward is such a distance that the mounting and disassembly protrusion 22 can be accommodated inside the inner flange portion 432, and the anti-detachment protrusion 24 in a state of protruding radially outward from the mounting and disassembly protrusion 22 can be located between the inner flange portion 432 and the bottom support portion 41 in the vertical direction. That is, the inner diameter of the inner flange portion 432 is larger than the outer diameter of the mounting and disassembly protrusion 22, and smaller than the outer diameter of the anti-detachment protrusion 24 based on the axis of the mounting and disassembly protrusion 22.

[0047] The outer flange portion 433 is a flange-shaped portion provided in a manner protruding radially outward from the upper end surface of the locking protrusion 43. In the present embodiment, the outer flange portion 433 is provided in a manner protruding radially outward from a portion of the circumferential direction of the locking protrusion 43. In addition, the outer flange portion 433 is configured so that the lower surface thereof is separated upward from the bottom support portion 41 to such an extent that the anti-separation claw 23 can be located between the outer flange portion 433 and the bottom support portion 41. In addition, the outer flange portion 433 of the present embodiment is provided in a pair spaced apart from each other in the circumferential direction of the locking protrusion 43. Specifically, the outer flange portion 433 is configured so that the rear claw portion 23r can be locked to the outer flange portion 433 on the other side when the front claw portion 23f can be locked to the outer flange portion 433 on one side. In addition, the pair of outer flange portions 433 is configured so that when the front claw portion 23f is located between the pair of outer flange portions 433 in the circumferential direction, the rear claw portion 23r is also located between the pair of outer flange portions 433 in the circumferential direction.

[0048] The rotation limiting recess 434 is a recess formed on the upper surface of the locking protrusion 43 and recessed downward, and can be engaged with the rotation limiting protrusion 251 in the rotation limiting state. In the present embodiment, a plurality of rotation limiting recesses 434 are arranged in a circumferential direction of the locking protrusion 43, spaced from each other. Specifically, the rotation limiting recess 434 is arranged so as to be engaged with the rotation limiting protrusion 251 in the rotation limiting state when the position of the mounting and disassembly portion 2 relative to the bracket loading portion (first loading portion) 4 is a fixed position P1 or a mounting and disassembly position P2, wherein the fixed position P1 is a position where the anti-separation claw 23 is engaged with the outer flange portion 433, and the mounting and disassembly position P2 is a position where all the anti-separation claws 23 are not engaged with the outer flange portion 433. The circumferential width of such a rotation limiting recess 434 is substantially equal to the circumferential width of the rotation limiting protrusion 251.

[0049] The connecting shaft 44 is a shaft-shaped protrusion protruding upward from the bottom support portion 41. In addition, the connecting shaft 44 is a portion coaxially arranged with the axis of the receiving cylinder portion 42 and the locking protrusion 43 (protrusion body 431). The connecting shaft 44 of this embodiment extends in a direction inclined relative to the seat surface of the vehicle V where the bracket (first retainer) 3 is provided. Figure 3As shown, the shaft fitting portion 221 of the seat portion 1 to be placed can be fitted on such a connecting shaft 44, and the detachable portion 2 of the seat portion 1 to be placed is coaxially arranged with the receiving cylinder portion 42 and the locking protrusion 43, so that the seat portion 1 to be placed can rotate about the connecting shaft 44. In addition, since the shaft portion extends in an inclined direction relative to the seat surface of the vehicle V on which the bracket (first retainer) 3 is provided, if the seat portion 1 is rotated, the angle of the seat back 12 relative to the seat surface of the vehicle V changes. In the present embodiment, when the seat back 12 is located at the rear side of the bracket (first retainer) 3, the seat back 12 is in an upright state 1A in which the seat back 12 is upright relative to the seat surface of the vehicle V, and when the seat back 12 is located at the front side of the bracket (first retainer) 3, the seat back 12 is in a tilted state 1B in which the seat back 12 is tilted relative to the seat surface of the vehicle V compared to the upright state 1A.

[0050] Next, refer to Figure 7 and Figure 8 The attachment and detachment of the seat portion 1 with respect to the bracket (first holder) 3 will be described. Figure 7 The seat portion 1 is shown as being fixed to the bracket (first holder) 3. Figure 8 The figure shows a state in which the seat portion 1 is detachable from the bracket (first holder) 3 .

[0051] like Figure 7 As shown, when the seat portion 1 is fixed to the bracket (first retainer) 3, the anti-separation claw 23 overlaps with the outer flange portion 433, and the anti-separation protrusion 24 overlaps with the inner flange portion 432, and the seat portion 1 is restricted from moving in the direction of removal relative to the bracket (first retainer) 3. Specifically, when the seat portion 1 is fixed to the bracket (first retainer) 3, the anti-separation claw 23 is located in the space between the outer flange portion 433 and the bottom wall portion 15, and the anti-separation protrusion 24 is located in the space between the inner flange portion 432 and the bottom wall portion 15. When the seat portion 1 is to be moved in the direction away from the bracket (first retainer) 3, the anti-separation claw 23 abuts and engages with the outer flange portion 433, and the anti-separation protrusion 24 abuts and engages with the inner flange portion 432, thereby restricting the movement of the seat portion 1. In addition, when the seat portion 1 is fixed to the bracket (first retainer) 3, the rotation limiting protrusion 251 is engaged with the rotation limiting recess 434 at the position where the anti-separation claw 23 overlaps with the outer flange portion 433, thereby limiting the seat portion 1 from rotating relative to the bracket (first retainer) 3 around the rotation axis R. In the present embodiment, when the seat portion 1 is fixed to the bracket (first retainer) 3, the extending direction of the seat seat portion 13 is configured to coincide with the front-rear direction. Specifically, the seat portion 1 is configured relative to the bracket (first retainer) 3 at a position where the anti-separation claw 23 overlaps with the outer flange portion 433. Figure 3 In the direction shown by the solid or dashed line.

[0052] like Figure 8 As shown, in a state where the seat portion 1 can be separated from the bracket (first retainer) 3, the anti-separation claw 23 is arranged at a position that does not overlap with the outer flange portion 433, and the anti-separation protrusion 24 is arranged at a position that does not overlap with the inner flange portion 432, thereby allowing the seat portion 1 to move in a direction of removal relative to the bracket (first retainer) 3. In this state, if the seat portion 1 is moved in a direction away from the bracket (first retainer) 3, the seat portion 1 is separated from the bracket (first retainer) 3. Specifically, in the state where the seat portion 1 is detachable from the bracket (first retainer) 3, all the separation prevention claws 23 are located at positions offset from the outer flange portion 433 in the circumferential direction, and all the separation prevention protrusions 24 are located radially inwardly relative to the inner flange portion 432. When the seat portion 1 is to be moved in the direction away from the bracket (first retainer) 3, the separation prevention claws 23 are not engaged with the outer flange portion 433, and the separation prevention protrusions 24 are not engaged with the inner flange portion 432, thereby allowing the seat portion 1 to move in the direction of being removed from the bracket (first retainer) 3. In the present embodiment, in the state where the seat portion 1 is detachable from the bracket (first retainer) 3, the seat portion 1 is rotated approximately 90 degrees around the rotation axis R from the state where it is fixed to the bracket (first retainer) 3. Specifically, the extending direction of the seat seat portion 13 is arranged to coincide with the left-right direction.

[0053] When switching from the state where the seat portion 1 is fixed to the bracket (first retainer) 3 to the state where the seat portion 1 can be separated from the bracket (first retainer) 3, the seat portion 1 is rotated about the rotation axis R to change the position of the anti-separation claw 23 relative to the outer flange portion 433, and the mounting and dismounting operation portion 19 is operated to switch the anti-separation protrusion 24 from the protruding state 24A to the retracted state 24B. Specifically, Figure 7 In the state where the seat portion 1 is fixed to the bracket (first holder) 3, the rotation operation portion 252 is operated to switch the rotation restriction protrusion 251 from the rotation restriction state to the rotation permission state, so that the seat portion 1 is rotated around the rotation axis R from the fixed position P1 where the anti-separation claw 23 is engaged with the outer flange portion 433 to the attachment and removal position P2 where the anti-separation claw 23 is not engaged with the outer flange portion 433 (the upper part of the anti-separation claw 23 is in an open state). After rotating to the attachment and removal position P2, the rotation restriction protrusion 251 is engaged with the rotation restriction recess 434. Then, the handle 18 is gripped and the attachment and removal operation portion 19 is pressed, thereby switching the anti-separation protrusion 24 from the protruding state 24A to the retracted state 24B, and after the seat portion 1 is lifted relative to the bracket (first holder) 3, the seat portion 1 is separated from the bracket (first holder) 3.

[0054] When the seat portion 1 is fixed to the bracket (first holder) 3, the steps are performed in the reverse direction of the above. Specifically, the seat portion 1 is placed on the bracket (first holder) 3, and the seat portion 1 is rotated from the attachment and detachment position P2 to the fixed position P1 around the rotation axis R, thereby engaging the anti-detachment claw 23 with the outer flange portion 433, engaging the anti-detachment protrusion 24 with the inner flange portion 432, and fitting the rotation restriction protrusion 251 with the rotation restriction recess 434, thereby restricting the seat portion 1 from rotating relative to the bracket (first holder) 3. Since the anti-detachment protrusion 24 of the present embodiment is biased to be in the protruding state 24A, it is not necessary to operate the attachment and detachment operation portion 19 when the anti-detachment protrusion 24 is in the protruding state 24A. Furthermore, since the rotation restricting protrusion 251 is urged to be in the rotation restricted state, it is not necessary to operate the rotation operating portion 252 when fitting the rotation restricting protrusion 251 into the rotation restricting recess 434 .

[0055] Next, refer to Fig. 9 and Fig.10 The seat holder (second holder) 5 will be described.

[0056] The seat retainer (second retainer) 5 is configured to be installed at a predetermined position outside the vehicle V to which the bracket (first retainer) 3 is fixed, and the seat portion 1 can be placed thereon in the installed state. The seat retainer (second retainer) 5 of this embodiment is installed at the predetermined position by being placed on the installation surface of the predetermined position. In addition, the seat retainer (second retainer) 5 can fix the seat portion 1 placed thereon so that the seat portion 1 will not be separated from the seat retainer (first retainer) 3 even if the seated child moves, etc.

[0057] The seat holder (second holder) 5 includes a holder placement portion (second placement portion) 6 on which the seat portion 1 is placed, and a leg portion 7 extending from the holder placement portion (second placement portion) 6 to a lower position. The leg portion 7 supports the holder placement portion (second placement portion) 6 from below. In addition, the seat holder (second holder) 5 can stand on its own when it is placed on a flat installation surface. The outer edge shape of the projection area of ​​the seat holder (second holder) 5 of this embodiment relative to the installation surface is an arc shape.

[0058] The holder placement portion (second placement portion) 6 is a portion provided on the upper portion of the seat holder (second holder) 5 and directly supporting the seat portion 1 placed thereon. Specifically, the holder placement portion (second placement portion) 6 includes: a detachable placement portion 61 receiving the bottom of the detachable portion 2 of the seat portion 1 placed on the seat holder (second holder) 5; a side support portion 62 extending upward from the outer edge of the detachable placement portion 61 and receiving the side surface of the detachable portion 2 of the seat portion 1 placed on the seat holder (second holder) 5; a side wall support portion 63 supporting at least the side wall portion 16 of the outer shell 14 of the seat portion 1 placed on the seat holder (second holder) 5; and a holder locking portion 64 locked with the locking protrusion 43 of the seat portion 1 placed on the seat holder (second holder) 5. In the present embodiment, the top of the holder placement portion (second placement portion) 6 is open. Furthermore, the seat portion 1 in the tilted state 1B can be placed on the holder placement portion (second placement portion) 6 of the present embodiment, and the placed seat portion 1 is held by the holder placement portion (second placement portion) 6 in the tilted state 1B.

[0059] The mounting and disassembling portion 61 is a portion having a supporting upper surface 61a, which faces the bottom surface of the mounting and disassembling portion 2 of the seat portion 1 to be mounted, and is a portion that abuts against the bottom surface of the mounting and disassembling portion 2 and supports the mounting and disassembling portion 2 from below. Specifically, the mounting and disassembling portion 61 is a wall body whose supporting upper surface 61a is larger than the bottom surface of the mounting and disassembling portion 2, and can be abutted against the bottom surface of the mounting and disassembling tube portion 21. The supporting upper surface 61a of the mounting and disassembling portion 61 of the mounting and disassembling portion 2 of the present embodiment is configured as a plane inclined relative to the installation surface, specifically, inclined in such a manner that the front side (one side) in the front-to-back direction (the first direction in the surface direction of the installation surface) is located above and the rear side (the other side) is located below. Furthermore, the mounting and disassembling portion 61 has a central opposing portion 6C that faces the mounting and disassembling central portion 2C of the mounting and disassembling portion 2 of the seat portion 1 to be mounted, at the central portion of the supporting upper surface 61a.

[0060] The side support portion 62 is a portion having a support outer surface 62a, which is opposed to the side surface of the mounting and disassembling portion 2 of the seat portion 1 to be placed, and is a portion that abuts against the side surface of the mounting and disassembling portion 2 to support the mounting and disassembling portion 2 from the side. Specifically, the side support portion 62 is a wall body erected upward from the support upper surface 61a of the mounting and disassembling loading portion 61, and is provided so that the support outer surface 62a is continuous with the support upper surface 61a of the mounting and disassembling loading portion 61. In the present embodiment, the support outer surface 62a of the side support portion 62 extends in a direction substantially orthogonal to the support upper surface 61a of the mounting and disassembling loading portion 61. That is, the support outer surface 62a of the side support portion 62 is provided so as to extend obliquely with respect to the up-down direction. The side support portion 62 of the present embodiment is configured to extend upward from a portion of the outer edge of the mounting and detaching portion 61. Specifically, the side support portion 62 is configured to extend upward from a portion of the outer edge of the mounting and detaching portion 61 that is located below the mounting and detaching central portion 2C. Furthermore, the amount of the side support portion 62 extending upward from the mounting and detaching portion 61 is configured to be greater on the rear side (the side where the support upper surface 61a of the mounting and detaching portion 61 is located below in the first direction) than on the front side (the side where the support upper surface 61a of the mounting and detaching portion 61 is located above in the first direction).

[0061] The side wall support portion 63 is a portion having a side wall support surface 63a, and the side wall support surface 63a supports the side wall portion 16 of the seat portion 1 placed thereon, and the side wall support portion 63 abuts against the side wall portion 16 from below to support the seat body 11. The side wall support portion 63 is arranged so that the side wall support surface 63a extends from the left side to the right side of the central facing portion 6C in the left-right direction (a second direction orthogonal to the first direction in the surface direction of the installation surface), and in the present embodiment, the side wall support surface 63a is provided to be continuous with the supporting outer surface 62a of the side support portion 62. Such a side wall support portion 63 can abut against the side wall portion 16 at least at the left side position and the right side position relative to the central facing portion 6C.

[0062] The retainer locking portion 64 is a portion provided in a manner protruding upward from the mounting and detaching placement portion 61, and can be engaged with the mounting and detaching portion 2 of the seat portion 1 placed on the seat holder (second holder) 5. Specifically, the retainer locking portion 64 includes: a locking body portion 641 protruding upward from the mounting and detaching placement portion 61; and a positioning portion 642 provided on the locking body portion 641, which positions the seat portion 1 relative to the seat holder (second holder) 5. The retainer locking portion 64 of this embodiment is arranged at a position biased toward the horizontal direction in the surface direction of the installation surface, and specifically, is arranged to be biased toward the rear side (the portion located below the mounting and detaching central portion 2C) relative to the central opposing portion 6C. Due to such a structure, compared with the case where it protrudes upward from the portion located above the mounting and detaching central portion 2C, the amount of extension of the retainer placement portion (second placement portion) 6 as a whole upward can be suppressed.

[0063] The locking body 641 is a protrusion disposed separately from the side support 62. Specifically, the locking body 641 includes an outer side facing portion 643 facing the support outer surface 62a of the side support 62, and an inner side facing portion 644 facing the outer peripheral surface of the attachment and detachment protrusion 22 in the attachment and detachment portion 2 of the seat portion 1 placed on the seat holder (second holder) 5. The size of the locking body 641 is such that it can be located between the attachment and detachment tube 21 and the attachment and detachment protrusion 22 of the seat portion 1 placed on the seat holder (second holder) 5. In addition, the locking body 641 includes a claw locking notch 645 that can be locked with the anti-detachment claw 23 of the seat portion 1 placed on the seat holder (second holder) 5, and a protrusion locking notch 646 that can be locked with the anti-detachment protrusion 24 of the seat portion 1 placed on the seat holder (second holder) 5.

[0064] The claw locking notch 645 is a notch of a size that can be engaged with the anti-separation claw 23 of the seat portion 1, and specifically, is a portion notched from the outer side facing portion 643 to the inner side facing portion 644. In addition, the claw locking notch 645 is a notch open at the top, and is configured to enable the anti-separation claw 23 to move from the top to the bottom and engage. In addition, the claw locking notch 645 of this embodiment is provided at two locations. In this embodiment, the two front claw portions 23f of the seat portion 1 are engaged with the two claw locking notches 645.

[0065] The protrusion locking cutout 646 is a cutout of a size that can be locked with the anti-separation protrusion 24. Specifically, the protrusion locking cutout 646 is a cutout formed to extend from the inner side facing portion 644 to the outer side facing portion 643. In addition, the protrusion locking cutout 646 is a cutout formed at the lower end of the locking body portion 641, and the upper part thereof is covered by the locking body portion 641. The protrusion locking cutout 646 of this embodiment is provided at two locations, and two anti-separation protrusions 24 of the seat portion 1 can be engaged.

[0066] The positioning portion 642 is a protrusion that is provided to protrude upward from the locking body portion 641. Such a positioning portion 642 is engaged with the engagement cutout 26 when the seat portion 1 is placed on the seat retainer (second retainer) 5 in a predetermined posture (in the tilted state 1B in the present embodiment), and is arranged at a position where the positioning portion 642 abuts against the attachment and detachment protrusion 22 to restrict the placement of the seat portion 1 on the seat retainer (second retainer) 5 when the seat portion 1 is placed on the seat retainer (second retainer) 5 in a posture other than the predetermined posture (in the upright state 1A in the present embodiment).

[0067] The leg portion 7 is a portion extending downward from the holder mounting portion (second mounting portion) 6. In the present embodiment, the leg portion 4 is provided so as to extend outward from the outer edge of the holder mounting portion (second mounting portion) 6 with reference to the surface direction of the installation surface. Specifically, the leg portion 7 includes a leg extension portion 71 extending downward from the outer edge of the holder mounting portion (second mounting portion) 6, and a contact portion 72 provided at the lower end of the leg extension portion 71. The leg portion 7 of the present embodiment is integrally formed with the holder mounting portion (second mounting portion) 6. In addition, the leg portion 7 of the present embodiment is a closed ring, and is configured such that the holder mounting portion (second mounting portion) 6 is located inside the ring, and the outer edge portion of the holder mounting portion (second mounting portion) 6 is integrally connected to the upper end of the leg portion 7. Furthermore, the leg portion 7 includes a side extension portion 7A located forward of the holder placement portion (second placement portion) 6, and a side extension portion 7B located rearward of the holder placement portion (second placement portion) 6. The side extension portion 7A is a portion extending forward and downward from the front end portion of the mounting and detaching placement portion 61, and the side extension portion 7B is a portion extending rearward and downward from the rear end portion of the side wall support portion 63. In the present embodiment, the distance L1 from the central opposing portion 6C to the abutment portion 72 of the side extension portion 7B in the front-to-back direction is greater than the distance L2 from the central opposing portion 6C to the side extension portion 7A. In addition, the projection area of ​​the leg portion 7 with respect to the installation surface is configured to be within the range of the projection area of ​​the seat portion 1 placed on the seat holder (second holder) 5 with respect to the installation surface.

[0068] Next, refer to Fig.10The attachment and detachment of the seat portion 1 with respect to the seat holder (second holder) 5 will be described. When the seat portion 1 is attached to the seat holder (second holder) 5, the handle 18 is gripped and the attachment and detachment operation portion 19 is pressed to bring the anti-detachment protrusion 24 into the retreat state 24B, and then the attachment and detachment portion 2 is placed on the attachment and detachment placement portion 61 in the state where the anti-detachment protrusion 24 is in the retreat state 24B. When the attachment and detachment portion 2 is placed on the attachment and detachment placement portion 61, the position of the seat portion 1 with respect to the seat holder (second holder) 5 is adjusted so that the positioning portion 642 is engaged with the engagement notch 26. In the present embodiment, the seat portion 1 is attached to the seat holder (second holder) 5 in a state where its front and rear sides are aligned with the front and rear sides of the seat holder (second holder) 5 and the rear claw portion 23r is engaged with the claw locking notch 645, and in the state where the attachment is completed, the seat portion 1 is in the tilted state 1B. Then, when the handle 18 is released, the anti-detachment protrusion 24 is pressed into the protruding state 24A and is engaged and locked in the protrusion locking notch 646 .

[0069] The seat portion 1 placed on the seat holder (second holder) 5 is restricted from rotating relative to the mounting portion 61 and moving in a direction away from the seat holder (second holder) 5 by the mounting portion 2 being locked to the locking body portion 641. Specifically, when the seat portion 1 is placed on the seat holder (second holder) 5, the anti-separation claw 23 of the mounting portion 2 is locked to the claw locking notch 645. Thus, when the seat portion 1 is about to rotate relative to the seat holder (second holder) 5 around the rotation axis R of the seat portion 1, the anti-separation claw 23 abuts against the locking body portion 641 (the left and right surfaces of the claw locking notch 645) to restrict the rotation of the seat portion 1. In addition, when the seat portion 1 is placed on the seat holder (second holder) 5, the anti-separation protrusion 24 of the mounting portion 2 is locked to the protrusion locking notch 646. Thus, when the seat portion 1 is to be moved away from the seat retainer (second retainer) 5, the anti-separation protrusion 24 is locked to the locking body portion 641 (the surface above the protrusion locking notch 646), thereby restricting the movement of the seat portion 1. In addition, even when the seat portion 1 is placed on the seat retainer (second retainer) 5, the rotation restricting protrusion 251 is not locked to the retainer placing portion (second placing portion) 6.

[0070] like Fig.11 and Fig.12As shown, the seat portion 1 placed on the seat holder (second holder) 5 is abutted and supported by the holder placement portion (second placement portion) 6. Specifically, the bottom surface of the attachment and detachment portion 2 abuts and is held by the support upper surface 61a of the attachment and detachment placement portion 61. In addition, the side surface of the attachment and detachment portion 2 abuts and is held by the support outer surface 62a of the side support portion 62. Specifically, the support outer surface 62a of the side support portion 62 abuts on the lower portion (rear end portion) of the side surface of the attachment and detachment portion 2 placed on the attachment and detachment placement portion 61. In this way, in the present embodiment, since the attachment and detachment portion 2 can be supported from two directions, the bottom surface and the side surface, the posture of the seat portion 1 relative to the seat holder (second holder) 5 is stable. In addition, the side wall portion 16 of the seat portion 1 placed on the seat holder (second holder) 5 abuts and is supported by the side wall support portion 63. Specifically, the side wall support surface 63a of the side wall support portion 63 supports the portion of the side wall portion 16 located on the left and right sides of the attachment and detachment center portion 2C of the seat portion 1. In this way, the side wall support portion 63 supports the side wall of the seat portion 1 (seat body 11), so that the seat portion 1 is placed on the seat retainer (second retainer) 5 in a stable state.

[0071] When the seat portion 1 is separated from the seat retainer (second retainer) 5, the handle 18 is gripped and the attachment and detachment operation portion 19 is operated to bring the anti-detachment protrusion 24 into the retreat state 24B. After the anti-detachment protrusion 24 is brought into the retreat state 24B, the engagement between the protrusion engagement notch 646 and the anti-detachment protrusion 24 is released, allowing the seat portion 1 to move in a direction away from the seat retainer (second retainer) 5. Then, the seat portion 1 is lifted, thereby enabling the seat portion 1 to move upward relative to the seat retainer (second retainer) 5 and be separated from the seat retainer (second retainer) 5.

[0072] According to the seat system structured as described above, the seat portion 1 removed from the bracket (first retainer) 3 can be placed on the retainer placement portion (second placement portion) 6 of the seat retainer (second retainer) 5 provided at a predetermined position for use. Thus, it is easy to understand how the seat portion 1 removed from the bracket (first retainer) 3 is to be placed at a predetermined position.

[0073] In addition, the predetermined position includes a setting surface on which the seat holder (second holder) 5 is provided, and the seat holder (second holder) 5 includes a leg portion 7 in contact with the setting surface, the leg portion 7 is extended to a lower part of the holder placement portion (second placement portion) 6, and includes a contact portion 72 abutting against the setting surface at the lower end, and the contact portion 72 can also be configured to be located outside the holder placement portion (second placement portion) 6 in the surface direction of the setting surface. With such a structure, since the contact portion 72 is located outside the holder placement portion (second placement portion) 6, the seat holder (second holder) 5 is in a stable state relative to the setting surface. As a result, the seat portion 1 placed on the seat holder (second holder) 5 is in a stable state relative to the predetermined position. In addition, the state in which the seat portion 1 is stable relative to the predetermined position refers to stability in a static state, specifically, stability to the extent that the seat portion 1 placed in a static state does not fall.

[0074] In addition, the holder placement portion (second placement portion) 6 includes a detachable placement portion 61 that receives the bottom surface of the detachable portion 2 placed on the seat holder (second holder) 5, and the detachable placement portion 61 includes a central facing portion 6C that faces the central portion of the bottom surface of the detachable portion 2 placed on the seat holder (second holder) 5. The leg portion 7 is configured to include: a one side extension portion 7A extending to one side in a first direction along the surface direction of the installation surface relative to the holder placement portion (second placement portion) 6, and an other side extension portion 7B extending to the other side in the first direction relative to the holder placement portion (second placement portion) 6, wherein in the first direction, a distance from the central facing portion 6C to the abutment portion 72 of the one side extension portion 7A is longer than a distance from the central facing portion 6C to the abutment portion 72 of the other side extension portion 7B. With such a structure, for example, when the extension distance of the seat body 11 for a child to sit on in the seat portion 1 from the center of the attachment and detachment portion 2 in the first direction to one side is greater than the extension distance to the other side, the seat portion 1 is placed on the seat holder (second holder) 5 in such a manner that one side of the seat body 11 is located on the side of the one side extension portion 7A, thereby enabling the seat portion 1 to be reliably supported by the seat holder (second holder) 5. As a result, the seat portion 1 is stabilized.

[0075] In addition, the predetermined portion includes a mounting surface on which the seat retainer 5 is mounted, the seat retainer includes a leg portion 7 configured to contact the mounting surface, the leg portion 7 includes an accessory mounting portion 73, and an accessory 74 that can be mounted and detached from the accessory mounting portion 73, and the accessory 74 can be configured to include the abutment portion 72 that abuts against the mounting surface when mounted on the accessory mounting portion 73. With such a structure, the seat retainer (second retainer) 5 can be used in two states: a state in which the accessory 74 is mounted and a state in which the accessory 74 is removed.

[0076] In addition, the seat portion 1 includes a side wall portion 16 extending upward from the attachment and detachment portion 2, and the holder placement portion (second placement portion) 6 can be configured to support both the attachment and detachment portion 2 and the side wall portion 16. With such a structure, since the holder placement portion (second placement portion) 6 supports both the attachment and detachment portion 2 and the side wall portion 16, the seat portion 1 is stable relative to the seat holder (second holder) 5.

[0077] The attachment and detachment portion 2 is formed so as to protrude downward from the seat body 11, and the attachment and detachment portion 2 protruding downward is placed on the holder placement portion (second placement portion) 6. As a result, the center of gravity of the seat placed on the seat holder (second holder) 5 can be placed downward, so that the seat portion 1 is stable when placed on the seat holder (second holder) 5.

[0078] In addition, the bracket (first holder) 3 is configured to allow the seat portion 1 to rotate about the rotation axis R intersecting with the bracket mounting portion (first mounting portion) 4, and the seat holder (second holder) 5 is configured to restrict the seat portion 1 from rotating about the rotation axis R intersecting with the holder mounting portion (second mounting portion) 6. As a result, the rotation of the seat portion 1 mounted on the seat holder (second holder) 5 is restricted, so that the seat portion 1 can be prevented from losing balance due to the rotation and tipping over.

[0079] In addition, the attachment and detachment portion 2 includes an anti-separation claw 23 that engages with the bracket placement portion (first placement portion) 4 to restrict the seat portion 1 from being separated from the bracket (first retainer) 3, and the anti-separation claw 23 is engaged with the holder placement portion (second placement portion) 6 to restrict the seat portion 1 from rotating about the rotation axis R that intersects the holder placement portion (second placement portion) 6. Thus, the seat portion 1 can be restricted from rotating relative to the seat retainer (second retainer) 5 by the structure for preventing the seat portion 1 from being separated from the bracket (first retainer) 3.

[0080] The holder placement portion (second placement portion) 6 includes a detachable placement portion 61 that contacts and supports the bottom surface of the detachable portion 2, and a side support portion 62 that contacts and supports the side surface of the detachable portion 2. Thus, the detachable portion 2 can be supported from the bottom surface and the side surface, so that the seat portion 1 is stable relative to the seat holder (second holder) 5.

[0081] The detachable mounting portion 61 is a surface inclined in a direction intersecting the installation surface, and the side support portion 62 is a portion extending upward from the outer edge of the lower detachable mounting portion 61. Thus, the detachable portion 2 can be reliably supported from the bottom and side surfaces.

[0082] In addition, the upper portion of the attachment and detachment placement portion 61 is open. Therefore, even in a state where the seat portion 1 is held with both hands, the seat portion 1 can be easily placed on the holder placement portion (second placement portion) 6.

[0083] The seat retainer (second retainer) 5 is configured so that its entirety is located inside the placed seat portion 1 in the plane direction of the installation surface. Thus, when the seat portion 1 is placed at a predetermined position via the seat retainer (second retainer) 5, it is possible to prevent the seat retainer (second retainer) 5 from occupying too large an area.

[0084] In addition, according to the seat holder as described above, the seat portion 1 removed from the bracket (first holder) 3 can be placed on the holder placement portion (second placement portion) 6 of the seat holder (second holder) 5 provided at a predetermined position for use. This makes it easy to understand how to place the seat portion 1 removed from the bracket (first holder) 3 at a predetermined position.

[0085] Although the embodiment of the present invention has been described above by taking one example, the present invention is not limited to the above embodiment, and various modifications can be added without departing from the gist of the present invention.

[0086] For example, the case where the bracket (first holder) 3 is provided in a car has been described, but the structure is not limited to this, and the bracket can also be provided in a vehicle V other than a car, such as a bicycle or a baby carriage 8 .

[0087] In addition, the case where the detachable portion 2 is rotatable relative to the bracket (first holder) 3 has been described, but the present invention is not limited to such a structure, and the detachable portion 2 may be restricted from rotating relative to the bracket (first holder) 3. In the case where the detachable portion 2 is restricted from rotating relative to the bracket (first holder) 3, the housing 14 may be rotatable relative to the detachable portion 2.

[0088] Furthermore, the case where the attachment and detachment portion 2 is provided to protrude downward from the housing 14 has been described, but the structure is not limited to this, and the bottom surface of the housing 14 may be recessed upward. When such a structure is adopted, the bracket placement portion (first placement portion) 4 and the holder placement portion (second placement portion) 6 may be formed into a shape protruding upward.

[0089] Furthermore, although the case where the detachable mounting portion 61 is inclined with respect to the installation surface has been described, the present invention is not limited to such a structure, and the detachable mounting portion 61 may be configured to extend parallel to the installation surface.

[0090] Furthermore, the case where the seat retainer (second retainer) 5 is used in a state of being placed at a predetermined position has been described, but the present invention is not limited to such a structure, and it is also possible to configure such a structure as to further include a fixing mechanism for fixing the seat retainer (second retainer) 5 at a predetermined position. By adopting such a structure, the placed seat is more stable than when only the seat retainer (second retainer) 5 is placed.

[0091] In addition, the case where the holder placement portion (second placement portion) 6 includes the side wall support portion 63 that supports the side wall portion 16 has been described, but the present invention is not limited to this structure, and the seat portion 1 can also be placed on the holder placement portion (second placement portion) 6 in a state where the side wall portion 16 is not supported.

[0092] Furthermore, the case where the seat holder (second holder) 5 holds the seat portion 1 in the tilted state 1B has been described, but the structure is not limited to this, and it can also be configured to support it in the upright state 1A. In such a structure, it can be a structure in which the positioning portion 642 is engaged with the fitting notch 26 of the seat portion 1 in the upright state 1A. In addition, it can also be configured that the seat holder (second holder) 5 does not have the positioning portion 642, and the seat portion 1 can be placed in both the upright state 1A and the tilted state 1B. Moreover, it can also be configured that the seat portion 1 can be rotated relative to the seat holder (second holder) 5 around the rotation axis R, and the posture is switched by rotating the seat portion 1 in a state where the seat portion 1 is set on the seat holder (second holder) 5.

[0093] In addition, the leg portion 7 is described as having the leg extension portion 71 and the lower end portion of the leg extension portion 71 is the abutment portion 72, but the present invention is not limited to this structure. For example, the seat retainer 5 can also be configured to have a fitting 74 extending below the retainer placement portion 6 and a fitting installation portion 73 that can attach and detach the fitting 74. As an example, Figures 13 to 16As shown in FIG. 1 , the leg portion 7 may be provided with a leg extension portion 71, a fitting 74, and a fitting mounting portion 73 disposed at the lower end of the leg extension portion 71, and the fitting 74 may be mounted below the leg extension portion 71 via the fitting mounting portion 73. In such a configuration, in a state where the fitting 74 is mounted, the lower end of the fitting 74 functions as a contact portion 72 that contacts the installation surface. That is, the leg portion 7 is configured by the leg extension portion 71, the fitting 74, and the fitting mounting portion 73, and in a state where the fitting 74 is mounted, the lower end of the fitting 74 functions as a contact portion 72, and in a state where the fitting 74 is not mounted, the lower end of the leg extension portion 71 functions as a contact portion 72. In addition, in the above configuration, the leg portion 7 includes a one-side extension portion 7A located in front of the holder placement portion (second placement portion) 6 and another-side extension portion 7B located in the rear of the holder placement portion (second placement portion) 6. Furthermore, in a state where the accessory 74 is removed, the lower end of the leg extension 71 can abut against the installation surface. Thus, the seat retainer (second retainer) 5 can be used in both a state where the accessory 74 is installed and a state where the accessory 74 is removed. In addition, the accessory mounting portion 73 can also be provided at a position other than the lower end of the leg extension 71 of the seat retainer 5. For example, it is also possible to configure the accessory mounting portion 73 to be arranged in the middle of the leg extension 71 in the vertical direction, and the accessory 74, in a state where the accessory 74 is installed in the accessory mounting portion 73, extends to a position lower than the holder mounting portion 6 and the leg extension 71, and the lower end thereof abuts against the installation surface as the abutment portion 72. Based on the above two examples, in summary, if the accessory 74 is extended to a position lower than the holder mounting portion 6 and the leg extension 71, and the lower end thereof abuts against the installation surface, the accessory mounting portion 73 can be provided at any position of the seat retainer 5. In another example, the leg extension portion 71 may not be provided, and in this case, the leg portion 7 is composed of the fitting 74 and the fitting mounting portion 73. In this case, the fitting mounting portion 73 may be directly connected to the holder mounting portion 6, for example.

[0094] exist Fig.13 and Fig.14 In the embodiment shown, the accessory mounting portion 73 is a portion that is fitted and mounted on the lower end of the leg extension portion 71, and is a separate entity from the leg extension portion 71. The accessory 74 is a portion that is arc-shaped when viewed from the side, and the center portion of the lower end portion (contact portion 72) in the front-to-back direction is located at a lower position, while the front and rear portions are located at higher positions. The seat retainer (second retainer) 5 equipped with such an accessory 74 can use the seat portion 1 mounted thereon as a cradle that can swing in the front-to-back direction. In addition, when the accessory 74 is not installed and used, the accessory 74 and the accessory mounting portion 73 can be removed from the leg extension portion 71 and used.

[0095] exist Fig.15 and Fig.16 In the embodiment shown, the accessory mounting portion 73 is a portion that is fitted and mounted on the lower end of the leg extension portion 71, and is a separate entity from the leg extension portion 71. In addition, the accessory mounting portion 73 has mounting locations 731 that can mount the accessories 74 at multiple locations. The mounting locations 731 are recessed portions into which the upper end of the rod-shaped accessories 74 described later can be inserted, and are provided at four locations in this embodiment. The accessories 74 are rod-shaped bodies extending in the vertical direction, and the lower end thereof is configured as the abutment portion 72. In this embodiment, four accessories 74 are provided. Such accessories 74 are respectively mounted at the mounting locations 731. In the seat retainer (second retainer) 5 equipped with such accessories 74, the seat portion 1 can be used in a state where it is separated upward relative to the installation surface. In addition, a plurality of sets of accessories 74 with different lengths in the vertical direction can be provided, and the length of the accessories 74 used can be changed according to the height at which the seat portion 1 is to be installed.

[0096] In addition, in the above-mentioned structure including the attachment 74, the attachment mounting portion 73 is described as an independent component mounted on the leg extension portion 71, but it can also be configured integrally with the leg extension portion 71. In addition, it can also be configured so that the attachment mounting portion 73 and the attachment 74 are fixed to the leg extension portion 71 in a non-detachable manner. Even in such a structure, it is easy to understand how to set the seat portion 1 removed from the bracket (first retainer) 3 to a predetermined position.

[0097] In addition, the case where the installation surface of the predetermined portion where the seat retainer (second retainer) 5 is installed is a floor or the like has been described, but the present invention is not limited to such a structure. Fig.17 and Fig.18 As shown, for example, it can also be a part of the baby carriage 8. Specifically, the baby carriage 8 includes: a plurality of wheels 81 that contact the ground and rotate, and a frame 82 connected to the wheels 81, and the frame 82 includes a setting portion 821 (prescribed portion) on which the seat holder (second holder) 5 is set, and the upper surface of the setting portion 821 is configured as a setting surface. The setting portion 821 includes a fixing mechanism (not shown) that engages with the seat holder (second holder) 5 set on the setting surface, and can fix the set seat holder (second holder) 5 to the frame 82. In this way, a part of the baby carriage 8 is configured as a prescribed portion, thereby enabling the seat portion 1 to be moved from a vehicle V provided with a bracket (first holder) 3 to the baby carriage 8 for use. That is, in such a mode, the seat portion 1 can be moved from a vehicle V provided with a bracket 3 to another vehicle, that is, a baby carriage 8, for use.

[0098] Description of Reference Numerals

[0099] 1: seat portion; 2: mounting and disassembling portion; 2C: mounting and disassembling central portion; 3: bracket; 4: mounting portion for bracket; 5: seat holder; 6: mounting portion for holder; 7: leg portion; 7A: one side extension portion; 7B: other side extension portion; 8: baby carriage; 11: seat body; 11a: connecting portion; 12: seat back; 13: seat seat portion; 13a: front end portion; 14: shell; 15: bottom wall portion; 16: side wall portion; 17: transverse wall portion; 18: handle; 19: mounting and disassembling operating portion; 21: mounting and disassembling cylinder portion; 22: mounting and disassembling convex portion; 221: shaft fitting portion; 223: mounting and disassembling operating transmission portion; 23: anti-separation claw; 23f: front claw portion; 23r: rear claw portion; 24: anti-separation protrusion; 25: rotation limiting mechanism; 251: rotation limiting protrusion; 252: rotation operating portion; 26: fitting notch; 31: base; 32: base body; 33: support leg; 34: mounting member; 41: bottom support; 42: cylinder; 43: locking protrusion; 431: protrusion body; 432: inner flange; 433: outer flange; 434: rotation limiting recess; 44: connecting shaft; 61: mounting and disassembling portion; 61a: support upper surface; 62: side support portion; 62a: support Outer surface; 63: Side wall supporting portion; 63a: Side wall supporting surface; 64: Locking portion for retainer; 641: Locking main body; 642: Positioning portion; 643: Outer opposing portion; 644: Inner opposing portion; 645: Claw locking incision; 646: Protrusion locking incision; 71: Leg extension portion; 72: Abutment portion; 73: Accessory mounting portion; 74: Accessory; 81: Wheel; 82: Frame.

Claims

1. A seat system comprising: The seat portion comprises a seat body on which a child can sit and a mounting and dismounting portion provided at the bottom of the seat body; A bracket, configured to be fixed to a vehicle and for the seat portion to be placed thereon; as well as A seat holder is provided at a predetermined position outside the vehicle and is provided for the seat portion to be placed thereon. The bracket includes a bracket placement portion configured to engage with the attachment and detachment portion of the seat portion placed on the bracket. The seat retainer includes a retainer placement portion configured to engage with the attachment and detachment portion of the seat portion in a state of being placed on the seat retainer.

2. The seat system according to claim 1, wherein: The predetermined portion includes a mounting surface on which the seat retainer is mounted. The seat retainer includes a leg portion configured to contact the installation surface of the predetermined portion. The leg portion extends to a position below the holder placement portion and includes a contact portion at a lower end portion, the contact portion being configured to contact the installation surface at the predetermined location. The contact portion of the leg portion is configured to be located outside the holder placement portion in the plane direction of the installation surface.

3. The seat system according to claim 2, wherein: The holder placement portion includes a detachable placement portion that receives a bottom surface of the detachable portion in a state of being placed on the seat holder. The attachment and detachment placement portion includes a central facing portion that faces a central portion of a bottom surface of the attachment and detachment portion placed on the seat retainer. The legs have: a one-side extension portion extending toward one side in a first direction along a surface direction of the installation surface relative to the holder placement portion; and The other side extension portion extends toward the other side in the first direction relative to the holder placement portion. In the first direction, a distance from the central facing portion to the contact portion of the other-side extended portion is longer than a distance from the central facing portion to the contact portion of the one-side extended portion.

4. The seat system according to claim 1, wherein: The predetermined portion includes a mounting surface on which the seat retainer is mounted. The seat holder includes a leg portion configured to contact the installation surface of the predetermined portion. The leg portion includes an accessory mounting portion and an accessory that can be attached to and detached from the accessory mounting portion. The attachment includes a contact portion that contacts the installation surface when the attachment is mounted on the attachment mounting portion.

5. The seat system according to claim 1, wherein: The seat portion includes a side wall portion extending upward from the attachment and detachment portion. The holder placement portion is configured to support both the attachment and detachment portion and the side wall portion.

6. A seat retainer for use in the seat system according to any one of claims 1 to 5.

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