JPH07117677A - Leg structure for wheel - Google Patents

Abstract

PURPOSE:To facilitate the loading and unloading of a seat for infant by installing a turnable leg member on the front and rear sides of a seat for infant which is installed on a vehicle seat and used also as baby car, in the width direction of the deat body, and allowing wheels to be accommodated in the left and right outside side parts of the seat body. CONSTITUTION:The front and rear castor arms 31 and 35 which are turnable on the front and rear sides of a seat body 3 are installed in the width direction of the seat body 3, and castors 32 and 36 are installed on the arms 31 and 35, respectively. In this case, the length in the width direction of the rear arm 35 is made longer than the length in the width direction of the front arm 31. When the castor 32 of the front arm 31 is turned to the rear side of the seat body 3, the castor 32 of the front arm 31 is accommodated into the left and right side parts of the seat body 3, and when the castor 36 of the rear arm 35 is turned to the front side of the seat body 3, the castor 36 of the rear arm 35 is accommodated into the left and right outside side part of the seat body 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel leg structure.

[0002]

2. Description of the Related Art Generally, a vehicle seat of an automobile is designed on the basis of an adult's physique, and the position of the body is lowered when a small infant sits down. Further, it is difficult to hold the infant's body firmly even if a seat belt is used. Therefore, an infant seat (child seat) is placed on an ordinary vehicle seat so that the infant can firmly hold his / her body when sitting.

Further, in recent years, with the spread of automobiles, there are increasing opportunities for children to go out and go out. Then, when getting off the car and moving with the infant, the infant is put in a stroller. Therefore, it is necessary to prepare both the child seat and the stroller when going out with the infant. Then, it is necessary to secure a fairly large space for mounting the stroller in the vehicle compartment, and the space for loading luggage and the like becomes narrow.

As a countermeasure against this, the actual construction of Shokai 62-13863
As disclosed in Japanese Patent Publication No. 8, there has been proposed one in which a leg member is pivoted to the lower portion of the infant seat so that the front wheels and the rear wheels are accommodated in the lower portion of the infant seat.

[0005]

However, if the front wheel and the rear wheel are accommodated in the lower portion of the infant seat, the height of the infant seat increases accordingly. Therefore, when the infant seat is placed on the vehicle seat, the infant seat and the vehicle ceiling easily interfere with each other, which makes it very troublesome to place and lower the infant seat on the vehicle seat. There is.

Further, after the leg members of the infant seat are rotated to accommodate the front wheels and the rear wheels, the infant seat is placed on the vehicle seat. There is a problem of damaging the seat.

Further, there is also a demand for accommodating the front wheels and the rear wheels by making the amount of rotation of the leg members of the infant seat as small as possible. The present invention has been made to solve the above problems, and a first object thereof is to provide a wheel leg structure having improved workability when loading and unloading an infant seat from a vehicle seat. It is in.

A second object is to provide a wheel leg structure in which the vehicle seat is prevented from being damaged by the wheels accommodated in the infant seat. A third object is to provide a wheel leg structure capable of accommodating the wheel on the left and right outer side portions of the seat body with a small amount of rotation of the leg member.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a leg member rotatable in the front and rear sides of the seat body in the width direction of the seat body. At the same time, in a wheel leg structure in which wheels are provided on the front and rear leg members, the width direction length of the leg members is made larger than the width direction length of the seat body, and the leg members are rotated. The gist is that the wheels are housed on the left and right outer sides of the seat body.

According to a second aspect of the present invention, leg members that are rotatable on the front and rear sides of the seat body are provided in the width direction of the seat body, and wheels are provided on the front and rear leg members. In the provided wheel leg structure, the width of the front leg member in the width direction is larger than the width of the front leg member in the width direction, and the wheel of the leg member on the front side is rear of the seat body. Wheel of the leg member on the front side is housed in the left and right outer side portions of the seat body by rotating the wheel of the leg member on the front side to the front side of the seat body to rotate the leg on the rear side. The gist of the invention is that the wheels of the member are housed in the left and right outer side portions of the seat body.

According to a third aspect of the present invention, leg members that are rotatable on the front and rear sides of the seat body are provided in the width direction of the seat body, and wheels are provided on the front and rear leg members. In the provided wheel leg structure, the gist of the wheel provided on the leg member is that the rotation support shaft of the wheel is arranged on the side on which the leg member rotates.

[0012]

According to the invention of claim 1, the leg members provided on the front side and the rear side of the seat body are rotated. At this time, the widthwise length of the leg member is larger than the widthwise length of the seat body. Therefore, the wheels provided on the leg members are arranged and accommodated on the left and right outer side portions of the seat body. Therefore, the wheels of the leg members do not protrude from the lower surface of the seat body.

According to the second aspect of the present invention, the leg member on the front side of the seat body is rotated to the rear side of the seat body. Further, the leg member on the rear side of the seat body is rotated to the front side of the seat body. At this time, the length of the front leg member in the width direction is shorter than the length of the rear leg member in the width direction, so that the leg members do not interfere with each other. Further, the front and rear leg members are housed in the left and right outer side portions of the seat body. Therefore, the wheels of the leg members do not protrude from the lower surface of the seat body. Since the front leg member has a shorter width in the width direction than the rear leg member, the wheels provided on the front leg member interfere with the side supports on both sides of the backrest and seat of the vehicle seat. Hateful.

According to the third aspect of the present invention, since the rotation support shafts of the wheels provided on the front and rear leg members are provided on the side where the leg members rotate, the leg members are rotated. This makes it possible to reduce the amount of rotation when the leg member is housed in a position where the wheels do not project from the lower surface of the seat body.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIGS. 1 and 2, the infant safety seat 1 of this embodiment includes a resin seat body 3 provided on a resin base body 2 and leg portions 4 provided on the base body 2. It is configured.

First, the structure of the seat body 3 provided on the base body 2 will be described. As shown in FIGS. 1 and 11, the seat body 3 is configured by integrally forming a seat portion 5 and a back portion 6 provided on the rear side of the seat portion 5 in a curved shape. Support portions 7 are integrally formed so as to face upward on the left and right sides of the seat portion 5 and to face the front side of the seat body 3 on the left and right sides of the back portion 6.
The support portion 7 is adapted to cover a front caster 106 and a rear caster 111, which will be described later as wheels.

A known child belt connecting device 8 is provided at the center of the seat portion 5 of the seat body 3. A sub belt 9 is provided near the boundary between the seat 5 and the support 7, and the sub belt 9 is connected to the child belt connecting device 8. Also, the seat 5
A belt device having a well-known emergency lock retracting mechanism (not shown) is provided on the back surface of the seat belt.
It is connected to the child belt connecting device 8 through the belt passing hole 11.

The sub-belt 9 and the main belt 10 can be detached from the child belt connecting device 8 by operating a press switch (not shown) provided in the child belt connecting device 8. Further, three belt through holes 11 through which the main belt 10 is inserted are formed in the right and left vertical directions of the back portion 6, respectively. Further, a cloth-made cover 12 having a cushioning property is attached to the surface of the seat body 3.

Further, as shown in FIGS. 1, 5, 9 and 11, the seat body 3 is reinforced so as to project to the back side on the left and right sides of the seat portion 5 and to the rear side on the left and right sides of the back portion 6. The projecting portion 13 that also serves as a unit is integrally formed. An arrangement space 14 is formed between the pair of protrusions 13 that protrude to the back side of the seat 5. Further, a bulging portion 5a projecting to the back side is formed at the center of the seat portion 5 on the front side, and a mounting bracket (not shown) of the belt connecting device 8 is housed in the bulging portion 5a. The device 8 is attached and fixed to the seat 5.

As shown in FIG. 11, a pair of connecting pieces 15 each having a substantially triangular shape are integrally formed on the upper surface of the support portion 7 formed on both right and left sides of the back portion 6. A pair of insertion holes 16 are formed on the upper surface of the support portion 7 formed on both the left and right sides of the seat portion 5. Then, the pair of insertion holes 16
A small hole 17 is formed between them. Also, body sheet 3
A pair of pipe insertion holes 18 are formed in the upper part of the back portion 6 in the.

A handle 19 bent in a U shape as shown in FIG. 12 is inserted into the pipe insertion hole 18, and the back portion 6 is formed.
Is projected to the rear side of. The handle 19 is on the back 6
It is attached to the upper portion of the back portion 6 by a handle attachment bracket 19a provided on the surface side of the. Then, the handle 19 slides along the inclination of the back portion 6, projects above the back portion 6 or sinks into the rear side of the back portion 6.

Further, as shown in FIG. 11, a protruding portion 20 having a rectangular shape protruding toward the rear side is formed on the upper portion of the back portion 6. A pair of through grooves 23a and 23b that are parallel to each other are formed on the back plate 21 and the bottom plate 22 that form the protruding portion 20, respectively. In addition, the rear plate 21 to the bottom plate 2
A connecting groove 24 is formed so as to connect the substantially central portions of the pair of through grooves 23a and 23b across the two. This through groove 2
The back plate 21 and the bottom plate 22 of the protrusion 20 are provided with a pair of belt support pieces 25a,
25b is formed. Further, the belt supporting pieces 25a, 2
A plurality of tooth portions 26 projecting into the through groove 23b are integrally formed on the 5b.

Further, as shown in FIGS. 13 and 20, a reinforcing plate 27 is attached and fixed to the bottom plate 22 and the pair of belt supporting pieces 25a and 25b. Reinforcement plate 27
A guide groove 28, which is aligned with the through groove 23b and the connection groove 24, is formed in the. Therefore, the pair of belt support pieces 2
5 a and 25 b are reinforced by a reinforcing plate 27.

As shown in FIGS. 11 and 12, mounting pedestals 30 are formed in the protrusions 13 on the left and right sides of the lower portion of the back portion 6. Further, a hook insertion hole 31 is formed on the side surface of the support portion 7 adjacent to the mounting base 30. Similarly, mounting pedestals 32 are formed on the left and right sides of the seat portion 5 on the front side. Further, a hook insertion hole 33 is formed on the side surface of the support portion 7 adjacent to the mounting base 32.

Metal hooks 34 are provided on the mounting bases 30, 32 from the outside of the seat body 3 through the hook insertion holes 31, 33, and the hooks 34 are mounted on the mounting bases 30, 32 by screws 35. It is fixed. As shown in FIG. 14, the hook 34 includes an attachment portion 36 attached to the attachment pedestals 30 and 32, and a belt engagement portion 3 protruding to the outer side surface of the support portion 7 through the hook insertion holes 31 and 33.
7 and 7. Further, a predetermined gap g is formed between the belt engaging portion 37 and the outer side surface of the support portion 7. The hook 34 is attached and fixed to the attachment pedestals 30 and 32 so that the upper side of the gap g is always open. Further, a semi-arcuate belt engaging protrusion 38 that protrudes toward the gap g is integrally formed at the tip of the belt engaging portion 37.

As shown in FIG. 1, FIG. 11, FIG. 12, FIG. 16 and FIG. 17, a pair of insertion holes 16 formed on the upper surface of the support portion 7 are formed with a curved side guard 40 made of resin.
A pair of guard connection pieces 41 formed at one end of the is inserted. This guard connecting piece 41 is supported by a tapping screw 42 which is screwed from the side of the support portion 7 into the support portion 7.
It is connected to the. Therefore, the side guard 40 is supported rotatably around the tapping screw 42.

As shown in FIGS. 15 and 18, a wall member 40a is integrally formed inside the other end of the side guard 40 in the width direction of the side guard 40. A gap absorbing wall 40b orthogonal to the wall member 40a is integrally formed on the wall member 40a and the side guard 40 on the other end side of the side guard 40.

Further, as shown in FIGS. 15 and 18, a pair of connecting pieces 15 formed on the support portion 7 are inserted into the other end of the side guard 40. And a pair of connection pieces 1
The gap absorbing wall 40b is arranged between the two.

The side guard 40 is inserted from the outer side portion of the side guard 40 into the guard hole 43 of the side guard 40, the connection hole 15a of the pair of connection pieces 15 and the connection hole 40c of the gap absorbing wall 40b. Four
0 is connected to the connection piece 15.

A slit 45 is formed in the guard connecting pin 44.
Is formed, and an elastic piece 46 is formed at the tip thereof. A locking claw 47 is formed on the outer peripheral surface of the distal end of the elastic piece 46, and the locking claw 47 engages with the outer peripheral edge of the guard hole 43 of the side guard 40. Therefore, the guard connection pin 44 does not easily come out.

Further, a claw housing recess 40d is formed on the outer peripheral edge of the guard hole 43 inside the side guard 40, and the locking claw 47 is arranged therein. Therefore, the guard connection pin 4 on the side where the locking claw 47 is formed
4 does not project to the inside of the side guard 40, that is, the seat portion 5 side. Further, the locking claw 47 and the claw storage recess 40
An insertion space portion into which a fingertip is inserted is formed between the insertion space portion and d.

Further, a size t1 is formed on the locking claw 47, and this size t1 is based on a size t2 between the side guard 40 and the connecting piece 15 and a size t3 between the gap absorbing wall 40b and the connecting piece 15. It is formed to be large.

Further, a fingertip is put into the insertion space of the claw housing recess 40, and the elastic piece 46 is operated to operate the locking claw 47 and the guard hole 43.
When the engagement with the outer peripheral edge of the guard connecting pin 44 is released, the guard connecting pin 44 is connected to the guard hole 43, the connecting hole 40c, and the connecting hole 15.
It can be pulled out from a.

At this time, the size t1 of the locking claw 47 is the size t
Since it is formed larger than 2 and t3, it is formed between the side guard 40 and the connection piece 15 and between the gap absorption wall 40b and the connection piece 1.
The locking claw 47 is prevented from getting into the gap with 5. Therefore, the guard connection pin 44 can be reliably pulled out or inserted to reliably connect the side guard 40 and the connection piece 15. Therefore, as shown in FIG. 21, the side guard 40 is configured to rotate around the tapping screw 42.

Further, holes 48 for passing the side guard 40, the child belt connecting device 8, the sub belt 9, and the main belt 10 are formed in each portion of the cover 12.
For convenience of explanation, FIG. 15 shows a hole 48 for inserting the connecting piece 15. The inner edge of the hole 48 is folded inward and sewn with a sewing thread 49. Therefore, the fibers of the cover 12 are prevented from fraying.

As shown in FIGS. 16, 17, and 19, the side guard 40 is formed in a hollow shape having a square cross section, and an opening 50 is formed in the lower portion thereof. Further, an L-shaped lock release lever 51 is provided inside the substantially center of the side guard 40 by means of a support shaft 52.
It is rotatably supported with respect to. Then, one end of the lock release lever 51 is exposed downward through the opening 50 of the side guard 40.

A front guard insertion hole 53 is formed on the upper surface of the side guard 40 on one end side. And
As shown in FIG. 19, in the side guard 40, an engagement release guide piece 54 which has elasticity integrally with the outer peripheral edge of the front guard insertion hole 53 is formed. Further, the engaging claw 5 is provided on the side surface of the guide piece 54 on the side of the front guard insertion hole 53.
5 are integrally formed.

In the front guard insertion hole 53 of the side guard 40, guard connecting pieces 57 integrally formed at both ends of a curved front guard 56 are inserted.
The guard connecting piece 57 is provided with a substantially square-shaped claw engaging hole 58. The claw engaging hole 58 of the guard connecting piece 57 and the connecting claw 55 of the engagement releasing guide piece 54 are engaged with each other, and the front guard 56 is connected and fixed to the pair of side guards 40.

Further, the engagement release guide piece 54 in the side guard 40 is bent in the direction of the arrow A so that the engagement claw 55 and the claw engagement hole 5 are formed.
When the engagement with 8 is released, the front guard 56 can be removed from the side guard 40.

As shown in FIG. 12, both ends of a bent reclining rod 60 are inserted into both inner side portions of the projecting portion 13 in the disposing space portion 14 on the back side of the seat portion 5. The reclining rod 60 is rotatably supported by the protrusion 13.
Further, the reclining rod 60 is connected to a coil spring 61 engaged with a side surface of the protruding portion 13 on the rear side of the reclining rod 60. Therefore, the reclining rod 60 is biased to rotate to the rear side.

Further, in the widthwise direction of the seat body 3, a shaft portion 63 of a reclining operation lever 62 is inserted and supported rotatably on both left and right sides of the rear surface of the bulging portion 5a. A locking hook 64 formed integrally with the operation lever 62 is hooked on the reclining rod 60. Therefore, when the reclining operation lever 62 is operated to the front side of the seat body 3, the locking hook 64
The reclining rod 60 to the coil spring 6
The seat body 3 can be rotated to the front side against the urging force of 1.

The structure of the reclining operation lever 62, the reclining rod 60 and the coil spring 61 enables the base body 2 to perform a reclining operation capable of adjusting the angle of the seat body 3. .

Next, the structure of the base body 2 that supports the seat body 3 will be described. As shown in FIGS. 22 and 24, the base body 2 has a planar rectangular shape, and its longitudinal direction is aligned with the front and rear side directions of the seat body 3. Then, as shown in FIGS. 3 and 5, the base body 2 is disposed in the disposing space portion 14 formed between the projecting portions 13 formed in the seat body 3. Further, as shown in FIGS. 3, 5 and 22, the base body 2 is formed with a lightening hole 70 having a quadrangular shape in the thickness direction thereof. Frame 71, front frame 7
2 and a rear frame 73. The pair of lateral frames 71, the front frame 72, and the rear frame 73 are integrally formed.

As shown in FIG. 24, the pair of horizontal frames 71 are curved so that the rear side of the base body 2 is slightly rearward from the center. Therefore, the pair of horizontal frames 7
A storage space 74 is formed on the lower surface of 1. The pair of lateral frames 71, the front frame 72, and the rear frame 73 have a lightening structure in which the upper surfaces are opened.

Support pin insertion holes 75 are formed on the top side surfaces of the pair of horizontal frames 71. Then, as shown in FIG. 22, a support pin 76 is inserted into the support pin insertion hole 75 from the lightening hole 70 side, and the support pin 76 is a pin support hole formed on the inner side surface of the projecting portion 13 in the seat portion 5. It is inserted in 77. Therefore, the seat body 3 is rotatably supported by the support pin 76 with respect to the base body 2, and the angle of the seat body 3 can be adjusted.

A pair of slits 78 are formed in the support pin 76 in the axial direction thereof, and a pair of elastic pieces 79 are formed by the slits 78. An engaging claw 80 that laterally projects is integrally formed on the outer periphery of the tip of the elastic piece 79. The engagement claw 80 engages with the outer peripheral edge of the pin support hole 77 so that the support pin 76 does not come out of the pin support hole 77 and the support pin insertion hole 75.

As shown in FIGS. 22, 24 and 25, a rod locking piece 81 is formed so as to project upward in the horizontal frame 71 on the front side of the support pin insertion hole 75 so as to be adjacent to the lightening hole 70. Has been done. A plurality of (three in the present embodiment) rod engaging recesses 82 are formed on the front side of the rod locking piece 81.

In the rod engaging recess 82 of the rod locking piece 81, the reclining rod 60 is attached to the coil spring 6.
It is fitted by the urging force of 1. Due to the engagement between the rod engaging recess 82 and the reclining rod 60, the seat body 3 is restricted so as not to be able to rotate about the support pin 76.

Then, as shown in FIG. 28, when the reclining operation lever 62 is rotated to the front side while resisting the biasing force of the coil spring 61, the reclining rod 60 is locked by the locking hook 64 of the reclining operation lever 62. Rotate to the front side. Therefore, the engagement between the reclining rod 60 and the rod engaging recess 82 is released. Therefore, the seat body 3 becomes rotatable about the support pin 76.

When the seat body 3 is rotated and the operation of the reclining operation lever 62 is released, the reclining rod 60 slides along the front side portion of the rod locking piece 81 by the urging force of the coil spring 61. Move. Then, when the reclining rod 60 corresponds to the rod engaging recess 82, the reclining rod 60 and the rod engaging recess 82 are engaged by the biasing force of the coil spring 61, and the rotation of the seat body 3 is restricted.

In this embodiment, by rotating the seat body 3 with respect to the base body 2 about the support pin 76, the angle of the seat body 3 can be adjusted every 10 °. It has become.

As shown in FIGS. 22, 27 and 28, an extending member 83 orthogonal to the horizontal frame 71 is integrally formed on the outer side portion of the horizontal frame 71 corresponding to the rod locking piece 81. An inclined member 84 extending obliquely upward to the rear side is integrally formed at the tip of the extending member 83. Further, a cylindrical regulation pin 85 orthogonal to the oblique member 84 is integrally formed on the outer side surface of the distal end of the oblique member 84.

As shown in FIGS. 22 and 25, the horizontal frame 7
An arm storage portion 86 is formed on the rear side of 1.
In addition, arm lock accommodating portions 87 are formed on both left and right sides of the rear frame 73. The arm storage portion 86 and the arm lock storage portion 87 are partitioned by a partition wall 88.

As shown in FIGS. 22 and 29, a lock arm 89 is provided in the arm storage portion 86. The lock arm 89 is connected to the support pin 76 and is rotatably supported about the support pin 76. or,
An arm lever 90 is integrally formed on the upper surface of the lock arm 89 corresponding to the support pin 76. One end of a wire 91 is connected to the arm lever 90. The wire 91 is introduced into the side guard 40 shown in FIG. 17 through a wire insertion hole (not shown) formed on the side surface of the support portion 7 and the small hole 17 shown in FIG. The other end of the wire 91 has the lock release lever 5
1 is connected to the other end.

As shown in FIG. 29, the lock arm 8 is
The leading end of 9 passes through the upper portion of the partition wall 88 and extends into the arm lock storage portion 87. Further, one end of a coil spring 92 is connected to the lower end of the lock arm 89 on the tip side,
The other end of the coil spring 92 is connected to the connection hole 93 of the horizontal frame 71 in the arm housing portion 86. Therefore, the lock arm 89 is biased clockwise by the coil spring 92 about the support pin 76. Therefore, the lower end surface of the lock arm 89 is always in contact with the partition wall 88.

At this time, as shown by the solid line in FIG.
A part of the other end of the lock release lever 51 provided on the side guard 40 projects from the lower surface of the side guard 40. Then, as shown by the chain double-dashed line in FIG. 17, when the other end of the lock release lever 51 protruding from the lower surface of the side guard 40 is pushed into the side guard 40, the wire 91 is inserted into the side guard 40. Be drawn in. Therefore, as shown in FIG. 30, the arm lever 90
Rotates around the support pin 76 in the counterclockwise direction, and the tip of the lock arm 89 is separated from the partition wall 88. Further, when the operation of the other end of the lock release lever 51 is released, the lock arm 89 and the arm lever 90 are rotated clockwise about the support pin 76 by the urging force of the coil spring 92, as shown in FIG. The lower surface of the tip end of the lock arm 89 contacts the partition wall 88.

As shown in FIGS. 23, 24, and 33, a semicircular arm reinforcing portion 95 having an open upper portion is provided on the outer side of the arm lock storage portion 87 formed on the left and right sides of the rear frame 73. Are integrally formed. A reinforcing rib 96 is integrally formed in the arm reinforcing portion 95. Further, as shown in FIG. 22, a rear frame blind cover 97 is formed on the upper surface of the rear frame 73 and the upper surface of the arm reinforcing portion 95 so as not to cover the upper portion of the arm lock housing portion 87. .

Then, as shown in FIG. 33, caster arm insertion holes 98 are formed in the arm reinforcing portion 95 and the rear frame blind cover 97 corresponding to the arm reinforcing portion 95. Similarly, caster arm insertion holes 99 are formed in the rear frame 73.

As shown in FIGS. 23, 25, 33, and 34, lightening recesses 100 are formed on the left and right sides of the front frame 72. A caster arm insertion hole 101 is formed in the front frame 72 corresponding to the lightening recessed portion 100. Further, a footrest 102 is integrally formed on the front side of the front frame 72. Reinforcing ribs 102b are integrally formed on the back surface of the footrest portion 102.

The footrest 102 has a reinforcing rib 102b.
A plurality of through holes 102a are formed so as to avoid
Therefore, the strength of the footrest 102 can be improved by the reinforcing rib 102b. Further, the through hole 102a can reduce the weight of the footrest 102, and
It is possible to easily remove dirt such as soil accumulated in the footrest 102. Then, as shown in FIGS. 25 and 26, a front frame blind cover 103 is provided on the front side upper surface of the front frame 72 so as to blind the upper surface of the lightening recessed portion 100.

Further, as shown in FIGS. 22 and 24 to 26, a sheet receiving portion 104 having a triangular cross section in the width direction of the base body 2 is integrally formed on the upper surface of the front frame blind cover 103.

As shown in FIGS. 23, 33 and 34, one end of a front caster arm 105, which is a leg member curved in a substantially L-shape, is rotatably inserted into the caster arm insertion hole 101. ing. A front caster 106 is provided at the other end of the front caster arm 105.

The front caster arms 105 inserted into the left and right pipe insertion holes 101 have both ends of an auxiliary pipe 107 having an outer diameter smaller than the inner diameter of the front caster arm 105. In addition, the auxiliary pipe 107
Is substantially the same as the width of the front frame 72 in the width direction.

Therefore, the end portion of the auxiliary pipe 107 and the one end portion of the front caster arm 105 are overlapped with each other in the lightening recessed portion 100 of the front frame 72. Then, the recessed portion 10
In 0, the auxiliary pipe 107 and the front caster arm 105 are crimped by a pair of rivets 108. Therefore, the pair of front caster arms 10 provided on the left and right sides of the front frame 72 of the base body 2 are provided.
5 is integrally rotated by an auxiliary pipe 107.

Further, as shown in FIGS. 1 and 33, one end of a rear caster arm 110, which is a leg member curved in a substantially L shape, is rotatably inserted into the caster arm insertion holes 98 and 99. Has been done. This rear caster arm 1
A rear caster 111 is provided at the other end of 10.
Further, as shown in FIG. 3, the rear caster arm 110 is attached to the base body 2 so as to project outward from the front caster arm 105 in the width direction of the base body 2.

Also, the caster arm insertion holes 9 on both the left and right sides
In the rear caster arm 110 inserted into the No. 8 and 99, both ends of an auxiliary pipe 112 having an outer diameter smaller than the inner diameter of the rear caster arm 110 are inserted. The length of the auxiliary pipe 112 is substantially the same as the length of the rear frame 73 in the width direction. Therefore, the end portion of the auxiliary pipe 112 and the end portion of the rear caster arm 110 are connected to the arm lock storage portion 87
Have been polymerized in.

As shown in FIGS. 23, 29, and 33, a rear arm lock 113 is provided on the outer peripheral surface of the rear caster arm 110 in the arm lock storage portion 87. This rear arm lock 113, auxiliary pipe 1
12 and the rear caster arm 110 are a pair of rivets 1.
It is crimped by 14. Therefore, the pair of rear caster arms 1 provided on both left and right sides of the base body 2
10 and the pair of rear arm locks 113 are auxiliary pipes 1.
It is designed to rotate integrally with 12.

The rear arm lock 113 has an extension 1
15 is integrally formed. An arc-shaped push-up surface 116 is formed on the upper surface of the tip of the extending portion 115.
In addition, a linear contact surface 117 is formed on the lower surface of the tip of the extending portion 115.
Are formed. Then, when the rear caster arm 110 is rotated clockwise from the state of FIG. 29, the pushing-up surface 116 of the extending portion 115 causes the lower end surface of the lock arm 89 to resist the biasing force of the coil spring 92, as shown in FIG. While pushing up.

Further, when the rear caster arm 110 is rotated clockwise (front side) and the extending portion 115 is rotated to the tip end side of the lock arm 89 as shown in FIG. 31, the lock arm 89 is rotated by the coil spring. The urging force of 92 makes contact with the partition wall 88. Therefore, the tip of the lock arm 89 contacts the contact surface 117 of the extension 115. Therefore, since the lock arm 89 and the rear arm lock 113 are engaged with each other, the rear arm lock 1
13 rotates counterclockwise, that is, the rear caster arm 11
0 is restricted so as not to rotate to the rear side.

A restricting surface 118 is formed on the bottom surface of the arm lock accommodating portion 87 so that the contact surface 117 of the rear arm lock 113 is in contact therewith. When the contact surface 117 of the rear arm lock 113 and the restriction surface 118 are in contact with each other, the rear caster arm 110 is restricted so as not to rotate further in the counterclockwise direction (rear side). Further, rear caster arms 110 are regulated by the rear arm locks 113 provided on the left and right rear caster arms 110 so as not to move in the width direction of the base body 2.

If the lock release lever 51 is operated to the position shown by the chain double-dashed line in FIG. 17, the lock arm 8
Since 9 is in the state of FIG. 32, the engagement between the lock arm 89 and the rear arm lock 113 is released, and the rear caster arm 110 and the rear arm lock 113 can be rotated counterclockwise (rear side). Has become.

Next, the front caster arm 105
Also, by rotating the rear caster arm 110, the front caster 106 and the rear caster 111 are projected to the lower surface of the base body 2, or the traveling position where the front caster 106 and the rear caster 111 are projected above the lower surface of the base body 2, and the child safety seat is positioned. The configuration of the link mechanism that brings 1 into the stroller state or the child seat state will be described.

As shown in FIGS. 35 and 36, one end of an aluminum connecting rod 120 having a square hollow shape is provided on the outer side of the center of the front caster arm 105. One end of the connecting rod 120 is supported by a shaft support pin 121, and the connecting rod 120 is connected to the front caster arm 10.
5 is rotatably supported. The connecting rod 120 is obliquely attached so as to face upward toward the rear side. Further, the connecting rod 120 connects the front straight portion 122, the rear straight portion 123 located outside the front straight portion 122 and parallel to the front straight portion 122, and the front straight portion 122 and the rear straight portion 123. And a slanted portion 124.

As shown in FIGS. 36, 38, and 39, a pair of arm support pieces 125 are formed at the tip of the rear side linear portion 123 of the connecting rod 120. In addition, a rectangular window portion 126 is formed on the central upper surface of the rear-side linear portion 123.
Are formed. A lever arm 128 is rotatably supported by a lever support pin 127 at the base end of the rear-side linear portion 123.

A handle spring 129 for urging the lever arm 128 toward the front side of the seat body 3 is provided on the lever support pin 127 between the base end of the rear linear portion 123 and the lever arm 128. . The lever arm 128 is urged toward the front side of the seat body 3 by the urging force of the handle spring 129 to come into contact with the regulation pin 85, and its rotation is regulated. Therefore, the lever arm 128 is located on the left and right outer side portions of the center of the support portion 7 of the seat portion 5.

As shown in FIGS. 36 to 39, a lock sliding member 130 made of stainless steel or iron is slidably arranged in the rear straight portion 123. Lock sliding member 1
A slide guide groove 131 is formed at the base end of the base member 30 so that the base end side is opened in the longitudinal direction thereof, and the lever support pin 127 can be inserted into the slide guide groove 131. Further, the lever guide pin 12 is provided in the sliding guide groove 131.
An urging spring 132 that comes into contact with 7 is provided. Therefore, the lock sliding member 130 is always urged toward the tip side of the rear-side linear portion 123.

Further, a notched recess 133 is formed in the upper portion of the tip of the lock sliding member 130 so as to face the window 126. A pressing surface 134 that is orthogonal to the longitudinal direction of the lock sliding member 130 is formed in the cutout recess 133. Further, an engagement notch 135 is formed on the lower surface of the tip of the lock sliding member 130. Further, at the tip of the lock sliding member 130, the push-down portion 1 is slanted downward toward the rear side.
36 is formed.

On the other hand, a lock member 140 made of stainless steel or iron is fixed to the inner side portion of the center of the rear caster arm 110 by a pair of rivets 141. The tip end side of the lock member 140 is formed so as to be obliquely raised toward the front side. Also, the lock member 140
Is formed so as to be inclined downward toward the front side. The tip portion thereof is arranged between the arm support pieces 125 of the rear-side straight portion 123 of the connecting rod 120. The tip end side of the lock member 140 is rotatably connected to the pair of arm support pieces 125 of the connecting rod 120 by a connecting support pin 142. The lock slide member 13 is attached to the tip of the connection support pin 142.
A locking protrusion 143 that engages with the engagement notch 135 formed at 0 is formed.

Further, a reinforcing auxiliary member 144 made of iron is arranged between the rear straight portion 123 and the lock sliding member 130. The reinforcing auxiliary member 144 includes a pair of side plates 145,
It is composed of a rotation restricting plate 146 that connects a part of the lower parts of the pair of side plates 145. Then, the reinforcing auxiliary member 1
44 is supported and fixed by the connection support pin 142. The rotation restricting plate 146 is disposed at the base ends of the pair of arm lock supporting pieces 125, and the upper surface of the rear-side linear portion 123 and the upper surface of the rotating restricting plate 146 are flush with each other. The upper surface of the rotation restricting plate 146 contacts the locking projection 143 formed at the tip of the locking member 140.

On the upper surfaces of the pair of side plates 145 of the reinforcing auxiliary member 144 on the tip side, an avoiding recess 147 is formed which has an inverted trapezoidal shape and widens toward the upper surfaces of the pair of side plates 145. The avoiding recess 147 is substantially aligned with the notch recess 133 of the lock sliding member 130.

The lock sliding member 130 is the biasing spring 13
The urging force of 2 slides to the front end side of the rear-side linear portion 123, and the pressing surface 134 formed in the notch recess 133 is exposed in the avoiding recess 147 formed in the pair of side plates 145. At this time, the engagement notch 135 of the lock sliding member 130 and the locking projection 143 of the lock member 140 are engaged.

Further, the front caster arm 105
The rear caster arm 110 and the rear caster arm 110 are connected by the connecting rod 120 and the lock member 140, and the front caster arm 10 is formed by forming the inclined portion 124 of the connecting rod 120.
5 and the rear caster arm 110 are absorbed in the difference in length in the width direction, so that they can be connected.

Further, the engagement notch 135 and the locking projection 143 are engaged with each other so that the connecting rod 120 and the lock member 14 are engaged.
0 is restricted so that it cannot rotate upward around the connection support pin 142. Also, the locking protrusion 1
Since 43 is in contact with the rotation restricting plate 146 of the reinforcement assisting member 144, the connecting rod 120 and the lock member 140 are restricted so that they cannot rotate downward about the connecting support pin 142. A protective cover 150 made of resin is attached to the lock member 140. Further, a resin-made connection protection cover 1 is provided at a connection position where the connection rod 120 and the lock member 140 are connected by a connection support pin 142.
51 is connected. When the lock member 140 is rotated around the connection support pin 142 on the upper part of the connection protection cover 151, the locking protrusion 143 of the lock member 140 is rotated.
Are formed so as not to interfere with each other.

Further, a lock release 153 is rotatably supported by the release shaft 153a on the front side upper surface of the connection protection cover 151. The lower side of the lock release 153 is inserted into the rear linear portion 123 through a window 126 formed in the rear linear portion 123. The lower side of the lock release 153 is disposed in the cutout recess 133 of the lock sliding member 130.
Further, the lock release 153 has an engaging recess 154 that engages with the pressing surface 134 of the notch recess 133 formed at a right angle.
Are formed. Further, a pressing sliding surface 155 is formed on the upper side of the lock release 153.

Therefore, the lever arm 128 causes the regulating pin 8 to move.
5, the lock sliding member 130 slides toward the front end side of the rear-side linear portion 123 by the urging force of the urging spring 132, and the engagement notch portion 135 and the locking protrusion 143 engage with each other. . At this time, the pressing surface 1 of the lock sliding member 130
34 engages with the engaging recess 154 of the lock release 153, and the urging force of the urging spring 132 causes the rear linear portion 123 to move.
The lock sliding member 130 is regulated so as not to project from the tip of the. The lever arm 128 includes a base portion 156, an intermediate portion 157 that bends from the tip of the base portion 156 to the front side of the seat body 3, and a grip portion 1 that bends further from the tip of the intermediate portion 157 toward the front side of the seat body 3.
58, and is curved as a whole.
Further, the lever arm 128 has a lightening structure with its rear side opened.

The base portion 15 of the lever arm 128
A rotation restricting portion 159 is formed substantially inside the center of 6. Further, inside the tip of the base portion 156 of the lever arm 128, the pressing sliding surface 15 of the lock release 153 is provided.
Sliding protrusions 160 that press 5 are formed.

Therefore, as shown in FIGS. 35, 37, and 39, the lever arm 128 is regulated by grasping between the grip portion 158 and the intermediate portion 157 from the state where the lever arm 128 is in contact with the regulation pin 85. It is rotated in the direction of separating from the pin 85 (rear side). Then, FIG. 40, FIG.
As shown in FIG.
Comes into contact with the upper surface of the connecting rod 120, and its rotation is restricted. On the other hand, the rotation of the lever arm 128 causes the sliding protrusion 160 to slide while pressing the pressing sliding surface 155 of the lock release 153.

Therefore, the lock release 153 rotates about the release shaft 153a. Then, the engaging recess 15
4 is configured to press the pressing surface 134 of the lock sliding member 130 while resisting the urging force of the urging spring 132.
By this pressing, the lock sliding member 130 slides on the base end side of the rear-side straight line portion 123 of the connecting rod 120.

When the lock sliding member 130 slides on the base end side of the rear-side linear portion 123 of the connecting rod 120, the engaging cutout portion 135 and the locking projection 14 of the locking member 140.
The engagement with 3 is released. In this state, the child safety seat 1 is lifted while holding the lever arm 128.

Then, as shown in FIG. 42, the connecting rod 12
0 and the lock member 140 rotate around the connection support pin 142 to perform a folding operation.
Further, the front caster arm 105 is rotated toward the rear side of the seat portion 5 by the rotating operation of the connecting rod 120. Then, as shown in FIGS. 6, 9 and 10, the front caster 106 provided on the front caster arm 105 is positioned between the lock member 140 and the support portion 7. Further, the front caster am 105 and the front caster 106 are in a state of being covered by the protective cover 150 that protects the upper surface and one side surface of the support portion 7, the connecting rod 120 and the lock member 140. At this time, the front caster 106 does not project downward from the lower surface of the base body 2.

On the other hand, the rear caster arm 110 is rotated toward the front side of the seat portion 5 by the rotation operation of the lock member 140. At this time, as shown in FIG. 29 and FIG. 30, the rear arm lock 113 disposed in the arm lock storage portion 87 rotates to push up the pushing surface 11 of the extending portion 115.
6 pushes the lower end surface of the lock arm 89 upward against the biasing force of the spring 92. Therefore, the lock arm 89 is configured to rotate counterclockwise about the support pin 76.

Further, as shown in FIGS. 6, 9, and 10, the rear caster 11 provided on the rear caster arm 110 is used.
1 is located on the outer side of the front linear portion 122 of the connecting rod 120. At this time, the rear caster 111 does not project downward from the lower surface of the base body 2. Further, as shown in FIG. 42, the locking projection 143 of the locking member 140 is arranged inside the bulging portion 152 of the connection protection cover 151.

When the rear caster 111 is located on the outer side of the front straight portion 122, the rear arm lock 113 is attached to the tip of the lock arm 89, as shown in FIG.
The extension portion 115 of is located. Therefore, the lock arm 89 is rotated about the support pin 76 by the urging force of the coil spring 92, and the lock arm 8 is rotated.
The lower surface of the tip of 9 contacts the partition wall 88. Therefore, the extension portion 1 of the rear arm lock 113
The abutment surface 117 of 15 is adapted to engage with the tip of the rom arm 89. As a result, the rotation of the rear caster arm 110 is restricted so as not to project to the lower surface of the base body 2.

Therefore, the front caster 106 and the rear caster 111 are disposed at the accommodation positions on the left and right outer side portions of the support portion 7 so as not to project to the lower surface of the base body 2, and the infant safety seat 1 is changed from the stroller state to the child seat state. You can do it.
Further, the slanted portion 124 of the connecting rod 120 prevents the front caster 106 and the rear caster 111 from interfering with the front straight portion 122 and the rear straight portion 123 of the connecting rod 120. Therefore, the rear caster 111 is provided on the outer side portion of the front straight portion 122, and the rear straight portion 123 is provided.
The front caster 106 can be disposed on the inner side portion of the.

Also, the lever arm 12 in the state shown in FIG.
When the grip of No. 8 is released, as shown in FIGS. 43 and 44,
The lever arm 128 is rotated toward the front side of the seat body 3 by the biasing force of the handle spring 129 to come into contact with the regulation pin 85, and the rotation thereof is regulated. At this time, as shown in FIGS. 7, 9 and 10, the lever arm 128 is positioned above the rear caster 111. Therefore, the intermediate portion 157 and the grip portion 158 of the lever arm 128 cover the upper portion of the rear caster 111.

As shown in FIGS. 6 to 10, the side guard 40 provided on the support portion 7 of the seat body 3 when the infant safety seat 1 is a child seat.
While holding, the other ends of the lock release levers 51 provided on the left and right side guards 40 are pressed into the side guard 40 as shown by the chain double-dashed line in FIG. By pressing the other end of the lock release lever 51, the lock release lever 51 is rotated and the wire 91 is drawn into the side guard 40 as shown by the arrow.

Then, as shown in FIG. 32, the wire 91
The lock arm 89 and the arm lever 90 provided on both the left and right sides of the base body 2 are rotated around the support pin 76 by the retracting operation of the. Therefore, the tip of the lock arm 89 is separated from the partition wall 88, and the engagement between the tip of the lock arm 89 and the contact surface 117 of the extension 115 of the rear arm lock 113 is released. .

In this state, when the side guard 40 is grasped and the child safety seat 1 is lifted up, the front caster arm 105 and the funnel caster 106 are rotated by their own weight toward the front side of the seat portion 5 and the base body 2 It projects to the lower surface. The front caster arm 105 and the front caster 106 are located at the traveling position. On the other hand, the rear caster arm 110 and the rear caster 111 are rotated to the rear side of the seat portion 5 by their own weights and similarly project to the lower surface of the base body 2. And. The rear caster arm 110 and the rear caster 111 are located at the traveling position.

The rotation of the front caster arm 105 and the rear caster arm 110 causes the connecting rod 12 to move.
0 and the lock member 140 rotate around the connection support pin 142 to perform a linear opening operation. Then, when the infant safety seat 1 is lowered onto the ground from the state where the front caster arm 105 and the rear caster arm 110 are hung, the front caster arm 105 and the rear caster arm 110 are spread apart in the direction in which they are separated from each other by their own weight. Has become.

At this time, the locking projection 143 of the lock member 140 disposed inside the bulging portion 152 of the connection protection cover 151 has the pushing-down portion 1 at the tip of the lock sliding member 130.
36 is pressed. Therefore, the lock sliding member 130 slides toward the base end side of the rear-side linear portion 123 while resisting the urging force of the urging spring 132.

Then, when the locking projection 143 gets over the push-down portion 136 at the tip of the lock sliding member 130 and comes into contact with the rotation restricting plate 146 of the auxiliary reinforcement member 144, the biasing force of the biasing spring 132 causes the lock sliding. The moving member 130 is adapted to slide to the tip side of the rear-side linear portion 123. Therefore, the engagement notch 135 of the lock sliding member 130 and the locking projection 143 of the lock member 140 are engaged with each other.

Therefore, the front caster arm 105 and the rear caster arm 110 are regulated so as not to rotate downward about the connecting support pin 142. Therefore, the front caster 106 of the front caster arm 105 and the rear caster 111 of the rear caster arm 110 are fixed to a predetermined traveling position. Further, the extension portion 1 in the rear arm lock 113 fixedly attached to the rear caster arm 110
The contact surface 117 of 15 engages with the restriction surface 118 formed on the bottom surface of the arm lock housing 87, and the rotation of the rear caster arm 110 is restricted.

Further, when the front caster arm 105 and the rear caster arm 110 are opened, the lever arm 128 abutting against the regulation pin 85 slides on the regulation pin 85 while centering on the lever support pin 127. It is designed to rotate.

As a result, the infant safety seat 1 in the child seat state can be used as a stroller. Next, the configuration of the front caster 106 that constitutes the leg portion 4 will be described.

As shown in FIGS. 1 and 45, a caster top 165 forming the front caster 106 is attached and fixed to the lower end of the front caster arm 105.
The caster top 165 is the front caster arm 105.
Is curved so as to be positioned inside the central axis L1 of the seat, that is, on the rear side of the seat 5.

As shown in FIG. 46, a front caster bracket 166 formed in the shape of a semicircle is provided on the lower surface of the tip of the caster top 165. The front caster bracket 166 is formed with a guide shaft hole 167 that is orthogonal to the ground. The guide shaft hole 167 is formed on the front side of the vertical line L2 that divides the front caster bracket 166 into two substantially.
The guide shaft 168 is inserted therethrough. The guide shaft 168 inserted through the guide shaft hole 167 is inserted into the caster top 165, and the front caster bracket 1
66 is rotatably supported.

Further, a spring accommodating portion 169 having a lower opening is formed at substantially the center of the front caster bracket 166. The spring housing portion 16 is provided on the lower surface of the front caster bracket 166 on the rear side of the vertical line L2.
A receiving piece 170 protruding to the 9 side is formed. Furthermore,
A spring guide piece 171 that projects into the spring housing portion 169 is formed on the front caster bracket 166 above the spring housing portion 169. That is, the front caster 106 is provided so as to be rotatable.

Further, a suspension arm 172 disposed so as to straddle the front caster bracket 166 is rotatably supported by an arm support pin 173 below the front caster bracket 166 on the front side of the vertical line L2. There is. Therefore, the suspension arm 172 is adapted to rotate around the arm support pin 173.

The tip of the suspension arm 172 is engaged with the upper surface of the receiving piece 170. A spring guide piece 174 is formed on the upper surface of the suspension arm 172 so as to face the spring guide piece 171.
A compressed suspension spring 175 is arranged between the spring guide pieces 171 and 174. Therefore, the tip of the suspension arm 172 is always engaged with the upper surface of the receiving piece 170 while being pressed against it.

A shaft insertion hole 176 is formed in the width direction of the suspension arm 172. This shaft insertion hole 176
A caster shaft 177 as a rotation support shaft is inserted through
Both ends thereof are projected from both ends of the suspension arm 172. And the front caster bracket 16
Front tires 178 are arranged on both sides of the wheel 6, and the front tires 178 are rotatably supported by the caster shafts 177.

The front tire 178 is a wheel 179.
And the tire rubber 1 arranged on the outer periphery of the wheel 179.
And 80. Then, as shown in FIG. 52, the wheel surfaces 181 of the wheels 179 of the pair of front tires 178 facing each other are formed on the rims 182 of the wheels 179 so as to be distant from each other.

An outer peripheral surface 182a of the wheel 189 is formed into a concave curved surface. And the outer peripheral surface 1
Conical protrusions 182b are formed on the surface 82a at predetermined intervals. The outer peripheral surface 182a is formed by the protrusion 182b.
The tire rubber 180 that fits into the tire is regulated so as not to come off easily.

Further, protective guide covers 183 are integrally formed on both sides of the outer peripheral edge of the front caster bracket 166 on the front side of the vertical line L2. Figure 5
1, as shown in FIG. 52, this protective guide cover 183
The cross-sectional shape of is curved so that the tip of the protective guide cover 183 approaches the front tire 178.
In addition, the length of the protective guide cover 183 in the width direction is formed to be substantially the same as the length of the front caster 106 configured by the pair of front tires 178 in the width direction.

Further, on the caster top 165, a swing lock arm 184 is arranged so as to straddle the caster top 165, and it is provided so as to rotate while sliding on the support shaft 185. Then, the swing lock arm 18
The operation portion 186 of No. 4 is provided so as to project to the rear side of the caster top 165.

Further, as shown in FIG. 46, the protective guide cover 1 at the top of the front caster bracket 166 is provided.
A turning restriction protrusion 187 is integrally formed on the upper surface of 83. Then, the front caster bracket 166 is swung to position the swivel restriction protrusion 187 below the swivel lock arm 184, and the operating portion 186 of the swivel lock arm 184 is pressed. Then, the swing lock arm 1
84 rotates while sliding around the support shaft 185. Therefore, as shown in FIG. 48, the turning restriction protrusion 187 is inserted into the turning lock arm 184. Therefore, the front caster bracket 166 provided with the pair of front tires 178 is restricted so as not to turn around the guide shaft 168.

A gap g1 is formed between the front tire 178 and the protective guide cover 183. When a shock or a load is applied to the pair of front tires 180 or the front caster arm 105, the suspension arm 172 rotates around the arm support pin 173 while compressing the suspension spring 175. At this time, as shown in FIG. 47, the tip of the suspension arm 172 is configured to move away from the upper surface of the receiving piece 170. When the suspension arm 172 rotates about the arm support pin 173 while compressing the suspension spring 175,
The front caster bracket 166 is designed to sink into the pair of front tires 178.

Therefore, the protective guide cover 183 and the upper surface side of the front tire 178 approach each other. At this time, the gap g1 becomes smaller than the protective guide cover 183 and the front tire 17.
It is formed between the protective guide cover 1 and
The interference between 83 and the front tire 178 is prevented. Therefore, the impact applied to the front tire 178 and the impact applied to the seat body 3 are absorbed by the expansion and contraction operation of the suspension spring 175.

When the front caster arm 105 is folded and the front caster 106 is located at the accommodating position, the protective guide cover 183 provided on the front caster bracket 166 is located below the front tire 178.

Next, the structure of the rear caster 111 will be described. As shown in FIGS. 1 and 53, a rear caster bracket 190 constituting a rear caster 111 is attached and fixed to the lower end of the rear caster arm 110. The caster top 191 of the rear caster bracket 190 is curved so as to be located inside the center line L3 of the rear caster arm 110, that is, on the front side of the seat portion 5. Then, as shown in FIG. 54, the rear caster bracket 190 is formed in a semi-circular plate shape.
The rear caster bracket 190 on the front side of the vertical line L4 that divides the rear caster bracket 190 into two.
An inclined surface 192 is formed on the.

Further, a spring accommodating portion 193 having a lower opening is formed at substantially the center of the rear caster bracket 190. A receiving piece 194 protruding toward the spring accommodating portion 193 is formed on the lower surface of the rear caster bracket 190 on the front side of the vertical line L4. Further, the rear caster bracket 1 at the upper part of the spring accommodating portion 193
At 90, a spring guide piece 195 protruding into the spring accommodating portion 193 is formed.

The rear caster bracket 190 on the rear side of the vertical line L4 has the rear caster bracket 19
Suspension arm 196 arranged so as to straddle 0
Are supported by arm support pins 197. Therefore, the suspension arm 196 has the arm support pin 1
It is rotatably supported around 97.

The tip of the suspension arm 196 is engaged with the upper surface of the receiving piece 194. The spring guide piece 19 is provided on the upper surface of the suspension arm 196.
A spring guide piece 198 is formed so as to oppose to 5. A compressed suspension spring 199 is arranged between the spring guide pieces 195, 198. Therefore, the tip of the suspension arm 196 is always in pressure contact with the receiving piece 194.

A shaft insertion hole 200 is formed in the width direction of the suspension arm 196. This shaft insertion hole 20
A caster shaft 201 as a rotation support shaft is inserted through the shaft 0, and both ends of the caster shaft 201 project from both ends of the suspension arm 196. And the rear caster bracket 19
Rear tires 202 are arranged on both sides of 0, and the rear tires 202 are rotatably supported by the caster shaft 201.

The rear tire 202 is composed of a wheel 203 and a tire rubber 204 arranged on the outer periphery of the wheel 203. Then, as shown in FIG. 61, the wheel surfaces 205 of the wheels 203 of the pair of rear tires 202 facing each other are formed on the rim 206 so as to be distant from each other.

The outer peripheral surface 203a of the wheel 203 is formed into a curved surface which is a concave surface. And the outer peripheral surface 20
3a has conical projections 203b formed at predetermined intervals. The protrusion 203b regulates the tire rubber 204 that is fitted so as not to come off easily.

Further, protective guide covers 207 are integrally formed on both sides of the outer peripheral edge of the rear caster bracket 190 on the rear side of the vertical line L4. 60 and 6
As shown in FIG. 1, the front end of the protection guide cover 207 is curved so as to approach the rear tire 202 side. The length of the protective guide cover 207 in the width direction is formed to be substantially the same as the thickness of the rear caster 111 configured by the pair of rear tires 202 in the width direction. Further, the rear tire 202 and the protection guide cover 207
A gap g2 is formed between and.

When a shock or a load is applied to the pair of rear tires 202 and the rear caster arm 110, the suspension arm 196 causes the suspension spring 1 to move.
While compressing 99, it rotates about the arm support pin 197. At this time, as shown in FIG. 55, the distal end of the suspension arm 196 has a receiving piece 194.
The separating operation is performed from the upper surface of the. When the suspension arm 196 rotates about the arm support pin 197 while compressing the suspension spring 199, the rear caster bracket 190 sinks into the pair of rear tires 202.

Therefore, the protective guide cover 207 and the rear tire 202 approach each other. At this time, since the gap g2 is formed between the protective guide cover 207 and the rear tire 202, the interference between the protective guide cover 207 and the rear tire 202 is avoided. Therefore, the impact applied to the rear tire 202 and the seat body 3
The shock given to the is absorbed by the expansion and contraction operation of the suspension spring 199.

Further, in the pair of rear tires 202, rotation lock portions 210 radially extending around the shaft insertion hole 200 are formed to project on the wheel surfaces 205 facing each other. This rotation lock part 210 is provided with the engaging recess 21.
1 and a plurality of engaging protrusions 212 are formed at predetermined intervals. Further, a circular pin locking projection 213 is formed at the tip of the engagement projection 212.

A rotation restricting member 214 is provided so as to straddle the rear caster bracket 190 on the front side. This rotation restricting member 214 is a member support shaft 2
It is rotatably supported by 15 so as to slide. Further, as shown in FIGS. 54 and 58, a pair of rotation restricting concave portions 216a and 216b are formed on both side surfaces of the rear caster bracket 190 on the front side of the vertical line L4. A rotation restricting protrusion 217 is formed on the inner surface of the rotation restricting member 214 so as to be engaged with the rotation restricting recesses 216a and 216b.

Further, the rotation restricting member 214 is provided with a rotation restricting operation lever 218 protruding from the space between the pair of rear tires 202 to the front side. The rotation regulating operation lever 218 has a first contact surface 220 that contacts the inclined surface 192.
And a second contact surface 221 are formed respectively. Further, the rotation restricting member 214 has a lock pin 2 which can be arranged in the engaging recess 211 of the rotation lock portion 210.
19 is formed overhanging.

Therefore, in the state of FIG. 56, the first contact surface 220 of the rotation restricting operation lever 218 contacts the inclined surface 192, and the lock pin 219 of the rotation restricting member 214 enters the engaging recess 211. Therefore, the lock pin 219 and the engagement protrusion 212 are not engaged with each other. Therefore, the pair of rear tires 202 are adapted to rotate. In this state, the rotation regulating operation lever 218 is operated, and the second contact surface 221 of the rotation regulating operation lever 218 is moved to the inclined surface 1.
Abut on 92.

Then, as shown in FIG. 57, the lock pin 219 is adapted to enter into the engaging recess 211 of the rotation lock portion 210. Further, the rotation restricting protrusion 217 of the rotation restricting member 214 is inserted into the rotation restricting recess 216b. Therefore, the lock pin 219 and the engaging protrusion 21
2 are engaged with each other, and the pair of rear tires 202 are locked so as not to rotate.

On the other hand, from the state shown in FIG. 57, the rotation restricting operation lever 218 is operated to rotate the rotation restricting member 214 so that the first contact surface 220 contacts the inclined surface 192. Then, as shown in FIG. 56, the lock pin 219
Comes out from the engaging recess 211 of the rotation lock portion 210,
The engagement between the engagement protrusion 212 and the lock pin 219 is released. Further, the rotation restricting protrusion 217 of the rotation restricting member 214 is engaged with the rotation restricting recess 216b. Therefore, the pair of rear tires 204 can be rotated.

When the rear caster arm 110 is folded and the rear caster 111 is located at the accommodation position, the protection guide cover 207 provided on the rear caster bracket 190 is located below the rear tire 202.

Next, the operation of the infant safety seat 1 configured as described above will be described. Figure 1 shows the base body 2
The front and rear casters 106 and 11 on the lower surface of the
1 shows a state in which the child safety seat 1 is used as a stroller by projecting 1 out. In this state, by operating the infant safety seat 1 while holding the handle 19, the front caster 106 and the rear caster 111 can be rotated and run. Further, since the front casters 106 are steerable, the front casters 106 are steered in response to the turning of the infant safety seat 1, and the infant safety seat 1 turns smoothly.

As shown by the solid line in FIG. 45, the swing lock arm 184 is attached to the front caster bracket 1.
66 does not engage with the turning restriction protrusion 187. Therefore, the front caster 1 configured by the pair of front tires 178 and the front caster bracket 166.
06 can be swung around the guide shaft 168.

If necessary, the operation unit 186 is operated,
Revolving lock arm 1 to the position shown by the two-dot chain line in FIG.
The 84 is rotated around the support shaft 185, and the turning restriction protrusion 187 is inserted into the turning lock arm 184. In this state, the front caster 1 configured by the pair of front tires 178 and the front caster bracket 166.
When 06 tries to turn around the guide shaft 168, the turn restricting protrusion 187 and the turn lock arm 184 engage with each other. As a result, the front casters 106 can be restricted from turning.

Further, the force due to the load or the impact is applied to the seat body 3
Is applied to the front caster 106 via the base body 2 and the front caster arm 105. This force is the front caster 10
When added to the front caster bracket 166 of No. 6, as shown in FIG. 47, the suspension arm 172 rotates on the side of the arm support pin 173 with the caster shaft 177 as a fulcrum.

By the rotation of the suspension arm 172, the suspension arm 172 is separated from the upper surface of the receiving piece 170 and the spring guide pieces 171 and 174 are formed.
The suspension spring 175 arranged therebetween is compressed. Therefore, the front caster bracket 166 sinks between the pair of front tires 178. At this time, the protection guide cover 1 of the front caster bracket 166
Although 83 approaches the front tire 178, mutual interference is avoided because the gap g1 is formed in advance.

As a result, even if a force is applied to the pair of front tires 178, the suspension spring 199 expands and contracts according to the force and absorbs the force, so that the riding comfort can be improved.

Further, a pair of front tires 178 whose thickness is not increased is used, and the wheel surfaces 181 of the wheels 179 constituting the front tire 178 are opposed to each other.
Are separated from each other to form a deviation on the rim 182. Therefore,
It is possible to widen the space formed between the pair of wheel surfaces 181.

By widening the space formed between the pair of wheel surfaces 181, the suspension arm 172 and the suspension spring 175 provided on the front caster bracket 166 can be easily accommodated in the space.

As a result, the suspension arm 172 and the suspension spring 175 can be blindfolded by the pair of front tires 178, and the appearance can be improved. Furthermore, the suspension arm 172
Since there is no need to provide a special cover ring for blindfolding the suspension spring 175, the front caster 106 can be made compact.

Further, since the guide shaft 168 is provided offset from the vertical line L2 of the front caster bracket 166 to the front side, the pair of front tires 178 can be always swung in the advancing direction. Further, due to the offset of the guide shaft 168, the front caster 10
It is possible to prevent 6 from turning carelessly.

Then, the front caster bracket 16
A turning control protrusion 187 is provided on the top of the turntable 6, and a turning lock arm 184 that engages with the turning control protrusion 187 is formed on the caster top 165. Therefore, the front caster 1
Since the turning lock arm 184 can be arranged above the pair of front tires 178 in 06,
The turning lock arm 184 that locks or unlocks the pair of front tires 178 so as not to turn can be easily operated.

Further, the front caster bracket 166.
Since the protection guide cover 183 for preventing splashing of mud and rainwater is integrally formed on the front caster bracket 106,
Since it is not necessary to attach another 6 materials to, the number of parts can be reduced and a compact structure can be achieved.

In this embodiment, the front tire 17
The pair of wheel surfaces 181 are formed so as to be spaced apart from the rim 182 of FIG. 8, but the wheel surfaces 181 themselves are bulged or curved so that the pair of wheel surfaces 181 are separated from each other. May be.

On the other hand, as shown in FIG. 54, the lock pin 219 of the rotation restricting member 214 does not enter the engaging recess 211 of the rotation lock portion 210. Also, the rotation regulating member 21
The rotation restriction protrusion 217 of No. 4 is in a state of being engaged with the rotation restriction recess 216a. Therefore, the pair of rear tires 202 can be rotated around the caster shaft 201.

Here, by operating the rotation restricting operation lever 218 from the state shown in FIG. 56, the rotation restricting member 214 is rotated around the member support shaft 215. Then, FIG.
As shown in FIG.
It is in a state of having entered into the engaging concave portion 211. Further, the rotation restricting protrusion 217 of the rotation restricting member 214 is provided in
It will be in the state engaged with 16b.

Therefore, even if the pair of rear tires 202 try to rotate around the caster shaft 201, the lock pin 21
Since 9 engages with the engaging protrusion 212, the rotation of the pair of rear tires 202 can be locked. Further, even if a force that the pair of rear tires 202 try to rotate around the caster shaft 201 is applied to the lock pin 219, the pin locking projection 213 prevents the lock pin 219 from easily coming out of the engagement recess 211. You can

Further, due to the engagement of the rotation restricting projection 217 of the rotation restricting member 214 and the rotation restricting recesses 216a and 216b, the rotation restricting member 214 is inadvertently moved.
It is possible to prevent the lock pin 219 from entering into the engagement recess 211 and the lock pin 219 from coming out of the engagement recess 211 by rotating around.

Similarly to the front casters 106, when a force due to a load, an impact, or the like is applied to the seat body 3, the force is applied to the rear casters 111 via the base body 2 and the rear caster arm 110. This force is applied to the rear caster bracket 190 of the rear caster 111.
55, the suspension arm 196 rotates on the side of the arm support pin 197 with the caster shaft 201 as a fulcrum, as shown in FIG.

By the rotation of the suspension arm 196, the suspension arm 196 is separated from the upper surface of the receiving piece 194 and the spring guide pieces 195, 198 are provided.
The suspension spring 199 arranged between them is compressed. Therefore, the rear caster bracket 190 sinks between the pair of rear tires 202. At this time, the protective guide cover 207 of the rear caster bracket 190 approaches the rear tire 202, but since the gap g2 is formed in advance, mutual interference is avoided.

As a result, even if a force is applied to the pair of rear tires 202, the suspension spring 199 expands and contracts according to the force and absorbs the force, so that the riding comfort can be improved.

Further, like the front casters 106,
Use a pair of rear tires 202 that do not increase in thickness,
Wheel surfaces 205 of the wheel 203 constituting the rear tire 202, which are opposed to each other, are formed on the rim 206 with a space therebetween. Therefore, the space formed between the pair of wheel surfaces 205 can be widened.

By widening the space formed between the pair of wheel surfaces 205, the suspension arm 196 and the suspension spring 199 provided on the rear caster bracket 190 can be easily accommodated in the space.

As a result, the suspension arm 196, the suspension spring 199, and the rotation lock portion 210.
Etc. can be blindfolded by the pair of rear tires 202, and the appearance can be improved. Furthermore, the suspension arm 196 and the suspension spring 199.
Since it is not necessary to provide a special cover ring for blindfolding, the rear caster 111 can be made compact.

Further, since the protection guide cover 207 is formed integrally with the rear caster bracket 190 which is on the rear side of the vertical line L4, it is possible to prevent splashing of mud and rainwater. As a result, there is no need to attach a separate member to the rear caster bracket 190 to prevent splashing of mud or rainwater, and the number of parts can be reduced, and
A compact configuration can be achieved.

Further, as shown in FIG. 19, the side guard 4
When the engagement release guide piece 54 formed in 0 is bent in the direction of arrow A, the engagement between the engagement claw 55 and the guard connection piece 57 is released. When the front guard 56 is pulled out in this state, the guard connecting piece 57 can be pulled out from the guard insertion hole 53.

Then, with the front guard 56 removed from the side guard 40, as shown in FIG. 18, the elastic piece 46 of the guard connecting pin 44 is bent to engage the locking claw 47 with the guard hole 43. To release. In this state, the guard connecting pin 44 is pulled out from the guard hole 43, the connecting hole 40c of the gap absorbing wall portion 40b, and the connecting hole 15a of the connecting piece 15.

At this time, the size t1 of the locking claw 47 is the size t
Since it is formed larger than 2 and t3, the guard connection pin 44 can be reliably pulled out. Then, the side guard 40 becomes rotatable around the tapping screw 42. Then, if the side guard 40 is rotated,
As shown in FIG. 21, the side guard 40 and the connection piece 15 are separated from each other.

Further, the main belt 10 and the sub belt 9 are detached from the child belt connecting device 8. Then, the main belt 10, the sub belt 9, the child belt connecting device 8, the side guard 40, and the connecting piece 15 can pass through the hole 48 of the cover 12, so that the cover 12 can be easily removed from the seat body 3. .

Therefore, since the other end of the side guard 40 is made detachable with respect to the connection piece 15, it is not necessary to form a slit for guiding the side guard 40 into the hole 48 in the cover 12. As a result, the appearance of the cover 12 can be improved. Moreover, the cover 12 can be easily removed from the seat body 3 to facilitate cleaning such as washing.

Further, the lever arm 128 is always biased to the front side by the handle spring 129 provided between the connecting rod 120 and the lever arm 128. At this time, the regulation pin 85 formed on the base body 3 regulates the frontward rotation of the lever arm 128, and the lever arm 128 is positioned on the left and right outer side portions of the center of the support portion 7 of the seat body 3. You can

Further, when the infant safety seat 1 is in the stroller state, the lock sliding member 13 in the connecting rod 120 is provided.
The engagement notch 135 at 0 and the locking projection 143 of the lock member 140 are engaged with each other. Further, the locking projection 143 is in a state of being engaged with the rotation restricting plate 146 of the reinforcement assisting member 144.

Therefore, even if the child safety seat 1 is lifted by the side guard 40, the engaging notch portion 13 is formed.
5, the connecting rod 120 and the locking projection 143 do not rotate about the connecting support pin 142 due to the engagement relationship between the locking projection 143 and the rotation restricting plate 146. As a result, the front caster arm 105 and the rear caster arm 110 are not rotated, and the front caster 106 and the rear caster 111 are always fixed at stable traveling positions.

Also, the locking projection 143 and the rotation restricting plate 1
By engaging with 46, the lock member 140 can be prevented from pivoting downward (on the ground side) about the connecting support pin 142. As a result, the front casters 106
Also, the rear caster 111 can be fixed to a stable traveling position at all times.

Next, in order to change the infant safety seat 1 from the stroller state shown in FIG. 1 to the child seat state, as shown in FIGS. Direction, that is, regulation pin 8
It is rotated in the direction away from 5. At this time, the lever arm 128 is positioned on the left and right outer sides of the center of the support portion 7 of the seat portion 5 by the regulation pin 85, so that the operability when gripping the lever arm 128 from the rear side of the infant seat 1 is improved. You can

Therefore, the lever arm 128 rotates about the lever support pin 127. Then, FIG. 40 and FIG.
As shown in FIG. 1, the rotation restricting portion 15 of the lever arm 128
9 contacts the upper surface of the connecting rod 120 and the lever arm 128
The sliding protrusion 160 slides while pressing the pressing slide surface 155 of the lock release 153 while restricting the rotation of the lock release 153. Therefore, the lock release 153 is the release axis 1
It rotates about 53a. By the rotation of the lock release 153, the engaging recess 154 presses the pressing surface 134 of the lock sliding member 130 against the biasing force of the biasing spring.

Then, the lock sliding member 130 is connected to the connecting rod 1.
20 slides on the base end side of the rear-side linear portion 123.
Therefore, the engagement notch portion 135 of the lock sliding member 130
The engagement between the locking projection 140 and the locking projection 143 of the locking member 140 is released. In this state, if the infant safety seat 1 is lifted while holding the lever arm 128, the connecting rod 120 and the lock member 140 rotate about the connecting support pin 142 as shown in FIG.

Therefore, with the front caster arm 105 pivoting to the rear side and the front caster 106 positioned above the lower surface of the base body 2, the protective cover 1
It is arranged at a storage position between the seat 50 and the support portion 7 of the seat body 3. Further, the rear caster arm 110 is pivoted to the front side, and the rear caster 111 is positioned above the lower surface of the base body 2 and is disposed at the accommodation position on the outer side portion of the front linear portion 122 of the connecting rod 120. To be done. Therefore, the front caster 106 and the rear caster 111 are stored in a storage position where they are not used.

On the other hand, when the rear caster arm 110 is rotated to the front side, the rear arm lock 113 shown in FIG. 29 is rotated as shown in FIG. for that reason,
The push-up surface 116 of the rear arm lock 113 pushes up the lower end surface of the lock arm 89 while resisting the biasing force of the coil spring 92. Then, the lock arm 89 rotates about the support pin 76 in a direction away from the partition wall 88. The rear caster 111 of the rear caster arm 110 is connected to the front straight portion 12 of the connecting rod 120.
When the rear lock arm 113 is disposed on the outer side of the lock arm 89, the rear lock arm 113 is located at the tip of the lock arm 89, as shown in FIG. Therefore, the lock arm 89 is rotated around the support pin 76 by the biasing force of the coil spring 92, and the lower end surface of the lock arm 89 is in contact with the partition wall 88.

Therefore, the contact surface 117 formed on the extending portion 115 of the rear arm lock 113 is in a state of engaging with the tip of the lock arm 89. The rear caster arm 110 is regulated by its own weight so as not to rotate to the lower surface side of the base body 2. As a result, the front caster 106 and the rear caster 111 are held at the storage position where they are not used. In this state, the infant safety seat 1 is once lowered and the lever arm 128 is released.

Then, as shown in FIGS. 43 and 44, the lever arm 128 is rotated to the front side by the urging force of the handle spring 129. And the lever arm 1
28 contacts the regulation pin 85 and its rotation is regulated.
At this time, the grip portion 158 and the intermediate portion 157 of the lever arm 128 are located above the rear caster 111 and cover the upper portion of the rear caster 111.

The lock sliding member 130 is the biasing spring 13
The urging force of 2 causes the connecting rod 120 to slide to the front end side of the rear-side linear portion 123. Then, the engaging recess 154 of the lock release 153 and the pressing surface 134 of the lock sliding member 130 are engaged with each other, and the sliding of the lock sliding member 130 by the urging force of the urging spring 132 is restricted.

Further, when the front caster 106 and the rear caster 111 are arranged at the accommodation positions, respectively, the protective guide covers 183 and 207 of the front caster bracket 166 and the rear caster bracket 190 are located below the front tire 178 and the rear tire 202. .

As shown in FIGS. 62 and 63, the child safety seat 1 in the child seat state can be mounted on the vehicle seat 230. That is, FIG. 62 shows an example of using the child safety seat 1 in the child seat state so as to face the vehicle seat 230. In this case, an infant up to the age of 1 is placed on the infant safety seat 1.

In this case, the seat belt 231 extending from the lower side of the door (not shown) is hooked on the one hook 34 which is inserted through the hook insertion hole 33 through the gap g, and the rear surface of the seat portion 5 is passed. Then, the seat belt 231 is hooked on the other hook 34 that is inserted through the hook insertion hole 33 through the gap g, and the connection fitting 232 is connected to the seat belt connection device 233. Further, the seat belt 231 is drawn around the back surface of the back portion 6, passes through the through grooves 23a and 23b, and is introduced into a winding device of a center pillar (not shown). Therefore, the seat belt 231 is supported by the pair of belt support pieces 25a and 25b.

In this case, the infant safety seat 1 can be mounted so as to easily face the vehicle seat 230 by the hook 34 that is inserted through the hook insertion hole 33.
Further, FIG. 63 shows an example in which the child safety seat in the child seat state is used in the same direction as the vehicle seat 230. This is a case where infants aged 1 to 4 are placed on the infant safety seat 1.

In this case, the seat belt 231 extending from the lower side of the door (not shown) is hooked on the one hook 34 which is inserted through the hook insertion hole 31 through the gap g, and is passed through the back surface of the back portion 6. Then, the seat belt 231 is hooked on the other hook 34 passing through the hook insertion hole 34 via the gap g to connect the connecting fitting 232 to the seat belt connecting device 233. Further, the seat belt 231 has the through groove 2
After passing through 3a and 23b, it is introduced into a winding device for a center pillar (not shown). Therefore, the seat belt 23
1 is supported by a pair of belt support pieces 25a and 25b.

In this case, the infant safety seat 1 can be easily mounted in the same direction as the vehicle seat 230 by the hook 34 that is inserted through the hook insertion hole 31. As a result, if the seat belt 231 is hooked on the hook 34 that matches the orientation of the infant safety seat 1, it can be attached to the vehicle seat 230 in response to the change in orientation of the infant safety seat 1.

Further, due to the engagement relationship between the hook 34 and the seat belt 231, the infant safety seat 1 is secured to the vehicle seat 230.
Can be attached to. As a result, the work of hooking the seat belt 231 on the hook 34 becomes easy. Therefore, it is possible to easily attach and remove the infant safety seat 1 to and from the vehicle seat 230.

When the infant safety seat 1 is impacted in the state shown in FIG. 62, the back portion 6 tries to move forward. At this time, since the seat belt 231 is hooked on the pair of belt support pieces 25a and 25b, the seat belt 231 supports the entire back portion 6. As a result, the infant safety seat 1 can be more reliably supported by the seat belt 231 and the safety can be improved.

Further, in the state shown in FIG. 63, when the child safety seat 1 is impacted, the back portion 6 tries to move to the front side. At this time, since the seat belt 231 is hung on the pair of belt support pieces 25a and 25b,
The seat belt 231 includes a pair of belt supporting pieces 25a, 2
The back part 6 is supported via 5b so as not to move to the front side. Further, since the belt supporting pieces 25a and 25b are reinforced by the reinforcing plate 27, the seat belt 23
Even if a strong impact is applied to the belt supporting pieces 25a and 25b by No. 1, it is not damaged. As a result, the infant safety seat 1 can be more reliably supported by the seat belt 231 and the safety can be improved.

In the stroller state where the front casters 106 and the rear casters 111 are used, the protective guide covers 183 and 207 are used for the purpose of preventing splashing of mud and water. This can be used as a device for catching mud and water when the front caster 106 and the rear caster 111 are not used in the child seat state.

As a result, even when the child safety seat 1 in the child seat state is placed on the vehicle seat 230, the mud and water adhering to the front casters 106 and the rear casters 111 are received by the protective guide covers 183 and 207, so that the vehicle seat 230 Can be prevented from becoming dirty. Moreover, the protective guide covers 183, 20
7 prevents the front tire 178 and the rear tire 202 from coming into direct contact with the vehicle seat 230 to prevent the vehicle seat 230 from being contaminated.

Further, unless the left and right lever arms 128 of the infant safety seat 1 are held and pulled to the rear side, the engagement between the lock sliding member 130 and the lock member 140 cannot be released. Therefore, the connecting rod 120 and the lock member 140 can be prevented from rotating around the connecting support pin 142. As a result, it is possible to reliably prevent the careless folding operation of the connecting rod 120 and the lock member 140.

Further, if the infant safety seat 1 is lifted while holding the lever arm 128 while pulling the lever arm 128 to the rear side, the lock sliding member 130 and the lock member 140 are disengaged from each other, and the connection support is provided. The connecting rod 120 and the lock member 140 can be rotated around the pin 142.

By rotating the connecting rod 120 and the lock member 140, the front caster arm 105 and the rear caster arm 110 can be rotated so that the front caster 106 and the rear caster 111 can be stored in the storage positions where they are not used. Further, by rotating the rear caster arm 110, the contact surface 117 of the rear arm lock 113 and the tip of the lock arm 89 can be engaged, and the rotation of the front caster arm 105 and the rear caster arm 110 is restricted. . Therefore, the state where the front caster 106 and the rear caster 111 are housed in the housing position can be maintained. Then, once the child safety seat 1 is lowered and the lever arm 128 is released, the lever arm 128 is brought into contact with the restriction pin 85 by the handle spring 129.

Therefore, when the lever arm 128 is pulled while rotating to the rear side and the infant safety seat 1 is lifted, the infant safety seat 1 in the stroller state can be brought into the child seat state.

As a result, the child safety seat 1, which is in the stroller state, can be brought into the child seat state by only operating the lever arm 128 without performing any special operation, and the operability can be improved.

Further, when the infant safety seat 1 in the stroller state is brought into the child seat state, the lever safety arms 1 on both the left and right sides are pulled up and the infant safety seat 1 is only lifted up. It can be easily performed with the infant on the seat 1.

Furthermore, the lever arm 1 is fixed by the regulating pin 85.
The lever arms 128 can be arranged on the left and right sides of the seat body 3 by restricting the rotation of the seat body 28. As a result, the operation of gripping the lever arm 128 and rotating it to the rear side can be easily performed.

Moreover, the operation of rotating the connecting rod 120 and the lock member 140 based on the operation of the lever arm 128 and the operation of lifting the infant safety seat 1 while holding the lever arm 128 are continuously performed. Therefore, operability can be improved.

Further, the front caster arm 105 and the rear caster arm 110 are connected by a connecting rod 120 supported by a connecting support pin 142 and a lock member 140. As a result, the folding operation of the front caster arm 105 and the rear caster arm 110 can be performed with a simple configuration. Moreover, the front caster arm 105 and the rear caster arm 110
The rotation amount of can be freely set.

Further, the lever arm 128 is provided with a base portion 156,
The intermediate portion 157 and the grip portion 158 were formed into a curved shape, and were attached to the connecting rod 120 so that the direction thereof would face the front side of the infant safety seat 1. Therefore, when disposing the front caster 106 and the rear caster 111 of the infant safety seat 1 in the stroller state, the infant safety seat 1 can be lifted while holding the lever arm 128.

Moreover, when the infant safety seat 1 is lifted, the grip portion 158 of the lever arm 128 engages with the base of the finger of the hand, so that the lever arm 128 does not slip off the hand. As a result, the lever arm 1
28 can be firmly gripped, and the infant safety seat 1 can be reliably lifted.

Further, since the front caster 106 is disposed between the support portion 7 of the seat body 3 and the protective cover 150, the front caster 106 is covered by the support portion 7 and the protective cover 150. As a result,
It is possible to adopt a configuration in which the front casters 106 are not easily touched.

The rear caster 111 is connected to the connecting rod 12.
0 is located on the outer side of the front straight portion 122, but the upper side of the rear caster 111 is located above the lever arm 1.
Covered by 28. As a result, the rear caster 111 can be easily touched.

Also, the lever arm 128 is the rear caster 1.
It is used as a cover for covering 11. Similarly, the front caster 106 is housed between the support portion 7 of the body sheet 3 and the protective cover 150.

As a result, it is not necessary to specially provide a cover for covering the front caster 106 and the rear caster 111, the number of parts can be reduced, and the structure can be made compact.

The lever arm 128 is always biased to the front side by the biasing force of the handle spring 129. Therefore, if the lever arm 128 is freely released after the front caster 106 and the rear caster 111 are arranged at the accommodation position, the lever arm 128 is rotated by the urging force of the handle spring 129 and is positioned above the rear caster 111.

As a result, the lever arm 1 is placed above the rear caster 111 without special operation of the lever arm 128.
28 can be positioned to cover the rear caster 111. Moreover, the lever arm 128 has a simple structure.
The rear caster 111 can be covered with the above.

Also, when the front caster 106 and the rear caster 111 are arranged at the accommodation position which is the outer side portion of the seat body 3, the front caster arm 105 and the rear caster arm 110 are located on the outer side portion of the base body 2. Becomes

Therefore, the front caster 106, the rear caster 111 and the front caster arm 105,
The rear caster arm 110 is not arranged below the base body 2. As a result, the height of the child safety seat 1 in the child seat state is lowered, and the child safety seat 1 can be easily taken in and out of the vehicle.

Further, since the front casters 106 and the rear casters 111 can be located on the outer side portions of the seat body 3, the front casters 1 are attached to the vehicle seat 230.
It is possible to prevent the 06 and the rear caster 111 from coming into contact with each other. As a result, the vehicle seat 230 can be prevented from becoming dirty.

Further, the length of the front caster arm 105 and the rear caster arm 110 in the width direction is equal to or longer than the length of the seat body 3 in the width direction.
As a result, when the child safety seat 1 in the child seat state is placed on the vehicle seat 230, the front caster arm 105 and the rear caster arm 110 contact the vehicle seat 230 to support the infant safety seat 1 in a stable state. be able to.

Further, the length of the rear caster arm 110 in the width direction is made larger than the length of the front caster arm 105 in the width direction. Therefore, even if the front caster arm 105 and the rear caster arm 110 are folded in a direction of approaching each other, it is possible to avoid mutual interference.

Furthermore, the length of the front caster arm 105 in the width direction is shorter than the length of the rear caster arm 110 in the width direction. Therefore, as shown in FIG. 63, when the child safety seat 1 in the child seat state is placed on the vehicle seat 230, the front casters 106 do not interfere with the side supports 234 of the vehicle seat 230 to prevent damage. Can be

A front caster 106 is provided on the rear side of the central axis L1 of the front caster arm 105, and a rear caster arm 111 is provided on the front side of the central axis L3 of the rear caster arm 110.

As a result, when the front caster 106 and the rear caster 111 are arranged at the accommodating position, the front caster 106 and the rear caster 111 are arranged at the accommodating position by a small rotation amount of the front caster arm 105 and the rear caster arm 110. You can
Moreover, the front casters 106 and the rear casters 111
Is projected from the lower surface of the base body 2, or the vehicle seat 23
It is possible not to touch 0.

In this embodiment, the lever arm 128
Although a handle spring 129 for urging the lever arm 128 is provided, it may be omitted if necessary, and a person can use the lever arm 128.
It is also possible to rotate so that it is positioned above the rear caster 111.

Next, to put the child safety seat 1 in the child seat state back into the stroller state, the side guards 40 on the left and right sides of the seat body 3 are first gripped. At the same time, as shown by the chain double-dashed line in FIG. 17, the lock release lever 51 provided in the side guard 40 is rotated.

The wire 91 is pulled into the side guard 40 by the rotation of the lock release lever 51. Then, when the wire 91 is pulled into the side guard 40, as shown in FIG. 32, the lock arm 89 resists the biasing force of the coil spring 92 via the arm lever 90 and the partition wall 88 centering on the support pin 76. It rotates in the direction away from. Then, the engagement between the contact surface 117 of the extending portion 115 of the rear arm lock 113 and the tip of the lock arm 89 is released.

In this state, if the infant safety seat 1 is lifted, the front caster arm 105 rotates to the front side by its own weight, and the rear caster arm 1
10 rotates to the rear side due to its own weight. Then, the front caster arm 105 and the rear caster arm 11
When the infant safety seat 1 is lowered with 0 hanging down,
The front caster arm 105 and the rear caster arm 110 further open to expand each other.

At this time, the connecting rod 120 and the lock member 1
40 performs an opening operation centering on the connection support pin 142. or,
The locking protrusion 143 of the lock member 140 presses the push-down portion 136 of the lock sliding member 130 while resisting the biasing force of the biasing spring 132. Therefore, the lock sliding member 13
0 slides on the base end side of the rear linear portion 123 of the connecting rod 120.

Eventually, the front caster arm 105 and the rear caster arm 110 expand to each other, and the front caster 106 and the rear caster 111 are positioned at the predetermined traveling position. Then, the locking protrusion 143 of the lock member 140 gets over the push-down portion 136 of the lock sliding member 130.

Therefore, since the pressing of the lock sliding member 130 is released by the locking projection 143, the lock sliding member 130 slides toward the tip side of the rear linear portion 123 by the urging force of the urging spring 132. To do. Therefore, the engagement notch 135 of the lock sliding member 130 and the lock member 14
The locking protrusion 143 of 0 is engaged. Also, the pressing surface 134 of the lock sliding member 130 and the lock release 153
The locking slide member 130 is prevented from sliding toward the front end side of the rear-side straight line portion 123.

Therefore, the child safety seat 1 which has been in the child seat state can be put in the stroller state again. Further, since the side guards 40 are provided on the support portions 7 on both the left and right sides of the seat body 3, the side guards 40 can be firmly gripped, and the child safety seat 1 in the child seat state can be easily lifted. Therefore, the child safety seat 1 in a child seat state can be carried. or,
Side guard 4 while operating the lock release lever 51
You can firmly hold 0 and lift the infant safety seat 1. Then, the infant safety sheet 1 can be put in a stroller state. As a result, even a weak woman can easily perform the above operation while the infant is placed on the infant safety seat 1.

In particular, the side guard 40 is provided on the seat body 3 so as to connect the upper surface of the support portion 7 in the seat portion 5 and the upper surface of the support portion 7 in the back portion 6. As a result, it is possible to improve workability when lifting the infant safety seat 1 by gripping the side guard 40 from the rear side of the infant safety seat 1.

Further, while holding the side guards 40 provided on the support portions 7 on both the left and right sides of the seat body 3 and operating the lock release levers 51 provided on the respective side guards 40, the infant safety seat 1 is lifted. Then, the lock can be released and the stroller state can be set.

Therefore, by operating the lock release lever 51 while holding the side guard 40 and lifting the infant safety seat 1, the child safety seat 1 can be brought into a stroller state.

As a result, since it is possible to carry out the operation while holding the infant safety seat 1 in a stable state, the safety is high and the operability can be improved. In addition, the lock release levers 5 provided on the left and right side guards 40
The child safety seat 1, which is in the child seat state, cannot be set in the stroller state unless both 1 are operated at the same time.

Therefore, even if only the lock release lever 51 provided on one side guard 40 is operated, the front caster arm 105 and the rear caster arm 110 are kept in the locked state. As a result, safety can be reliably ensured so that the front caster arm 105 and the rear caster arm 110 do not rotate even if only one lock release lever 51 is operated.

In this embodiment, when the front caster arm 105 and the rear caster arm 110 are accommodated in the accommodating position and the infant safety seat 1 is in the child seat state, the front caster arm 105 is in the child seat state.
Also, the rear caster arm 110 is in a state of protruding slightly below the base body 2.

As a result, this front caster arm 1
05 and the rear caster arm 110 also support the seat body 2, so that the infant safety seat 1 can be mounted on the vehicle seat 230 in a more stable state.

Further, the base main body 2 is formed with a lightening hole 70 having a rectangular shape. As a result, the weight of the base body 2 can be reduced. Moreover, although a belt device (not shown) is attached to the center of the back surface of the seat portion 5, the work of attaching the belt device can be facilitated.

Furthermore, after passing the main belt 10 extending from the belt device between the base body 2 and the seat body 3,
The belt is passed through the belt passing hole 11 of the back portion 6. At this time, the operation of passing the main belt 10 extending from the belt device between the base body 2 and the seat body 3 can be easily performed, and the main belt threading operation can be easily performed.

[0230] Then, it is possible to prevent dust and the like from accumulating on the upper surface of the base body 2, and the infant safety sheet 1 can be kept clean. On the contrary, by forming the lightening hole 70, the base body 2 of the child safety seat 1 can be easily cleaned. Further, by forming the lightening hole 70, the assembling work for connecting the base body 2 and the seat body 3 with the support pin 76 can be easily performed.

Also, a pair of horizontal frames 7 constituting the base body 2
1 was formed so as to curve upward. Therefore, when the infant safety seat 1 in the child seat state is placed on the vehicle seat 230, the infant safety seat 1 can be placed along the curved shape of the vehicle seat 230. As a result, the infant safety seat 1 is replaced with the vehicle seat 230.
Can be placed in a stable state with respect to.

Furthermore, a pair of horizontal frames 71 forming the base body 2 are formed so as to be curved upward, and the pair of horizontal frames 71 are formed.
A storage space 74 is formed on the lower surface of the. Therefore, FIG.
As shown in FIG. 2, for example, a reinforcing rod 235 is provided on the front caster arm 105, and the front caster arm 1
Suppose that 05 is reinforced.

The front caster arm 105 in this state
Even if the front caster 106 is disposed at the accommodating position by rotating, the reinforcing rod 235 can be disposed within the accommodating space 74 as shown in FIG. 65, and therefore the amount of rotation of the front caster arm 105 does not change. . As a result, the front caster 106 can be disposed between the support portion 7 and the protective cover 150, as in the above-described embodiment. Further, the front caster arm 105 can be reinforced by the reinforcing rod 235.

Further, since the front caster arms 105 which are inserted into the base body 2 from both the left and right sides are connected by the auxiliary pipes 107, the rotations of the left and right front caster arms 105 can be synchronized. Similarly, since the rear caster arms 110 that are inserted into the base body 2 from the left and right sides are connected by the auxiliary pipes 112, the rotations of the left and right rear caster arms 110 can be synchronized.

Further, since the front caster arm 105 and the rear caster arm 110, which are inserted into the base body 2 from both the left and right sides, are connected by the auxiliary pipes 107 and 112, the base body 2 can be integrally molded.

As a result, the number of parts forming the base body 2 can be reduced and the strength of the base body 2 can be improved. Furthermore, a footrest 102 is integrally formed at the tip of the base body 2. As a result, it is not necessary to provide the footrest 102 on the front caster arm 105 or the base body 2 by a separate member, and the number of parts can be reduced.

When the child safety seat 1 is placed on the vehicle seat 230 in the child seat state, the footrest 102 also comes into contact with the vehicle seat 230. As a result, the load of the infant safety seat 1 can be prevented from being partially applied to a part of the vehicle seat 230, and the vehicle seat 230 can be protected.

Further, when the infant safety seat 1 is attached to the vehicle seat 230 in the stroller state and the seat receiving portion 104 of the base body 2 receives the seat body 3 in the event of a strong impact due to an accident or the like. . As a result, the strong impact applied to the seat body 3 is applied to the base body 2
The safety of the infant safety seat 1 can be improved because it can be released.

Although the infant safety seat 1 may be in a stroller state or a child seat state, the reclining operation lever 62 is operated to attach the reclining rod 60 to the coil spring 61 by the locking hook 64. Rotate while resisting power. Then, as shown in FIG. 27, the reclining rod 60 is in a state of coming out of the rod engaging recess 82 of the rod locking piece 81.

Then, the seat body 3 becomes rotatable about the support pins 76. In this state, the support pin 76
The seat main body 3 is rotated around, and the operation of the reclining operation lever 62 is released. Then, the reclining rod 60 slides along the side surface of the rod locking piece 81 by the urging force of the coil spring 61, and when the reclining rod 60 and the rod engaging concave portion 82 correspond to each other, the reclining rod 60 and the rod engaging concave portion 82 engage. Are combined. Therefore, the seat body 3 includes the reclining rod 60 and the support pin 76.
With the above, the state of being supported and fixed to the base body 2 is achieved.

Although the side guard 40 of this embodiment is attached so as to extend from the support portion 7 of the seat portion 5 to the support portion 7 of the back portion 6, the side guard 40 is integrally formed as shown in FIGS. 66 to 68. May be. Further, a grip portion 240 for facilitating gripping of the support portion 7 may be integrally formed with the support portion 7 above the back portion 6.

With this configuration, the infant safety seat 1 is first placed on the vehicle seat 230, and then the infant safety seat 1 is attached to the vehicle seat 230 as shown in FIG. 62 or FIG.
When operating in the predetermined state shown in FIG. 3, the grip portion 240 can be gripped. As a result, the operability of the infant safety seat 1 can be improved.

Further, the other end of the side guard 40 in the present embodiment can be brought into contact with and separated from the support portion 7 of the back portion 6 by inserting / removing the guard connecting pin 44. for that reason,
The cover 12 can be improved in aesthetics without forming a joint, and the cover 12 can be easily removed from the seat body 3. It is also possible to apply this configuration to a child seat that cannot be put into a baby car state or a stroller that cannot be put into a child seat state.

In this embodiment, the infant safety sheet 1 is used.
In the child seat state, the operator grips the left and right side guards 40 and operates the lock release lever 51. In this state, when the infant safety seat 1 is lifted by holding the side guard 40, the rear arm lock 113 and the lock arm 89 are unlocked, and the infant safety seat 1 can be brought into a stroller state.

In addition to this, a lock release lever 51 is provided on only one of the side guards 40.
The rear arm lock 113 and the lock arm 89 may be unlocked by operating 1.

In this embodiment, the infant safety sheet 1 is used.
When the car is in the child seat, the lever arm 1
The reference numeral 28 is configured to abut the regulation pin 85 and be located above the rear caster 111. This regulation pin 85
Alternatively, the rotation restricting operation lever 218 provided on the rear caster 111 may be used to restrict the rotation of the lever arm 128.

In the present embodiment, the lightening hole 70 is formed in the base body 2 of the infant safety seat 1 whose shape is changed to the child seat state and the stroller state. It is also possible to form the hole 70. Further, the horizontal frame 71 formed by forming the lightening hole 70 can be curved upward similarly to the above embodiment.

Further, it is possible to form the sheet receiving portion 104 on the base body of a simple child seat.
In this embodiment, the hook 34 for hanging the seat belt 231 and the pair of belt supporting pieces 25a, 25b for supporting the upper side of the back portion 6 are provided on the infant safety seat that changes its form between the child seat state and the stroller state.
The hook 34 may be provided on a simple child seat.
Further, the belt support piece 25a,
25b may be provided.

Although the side guard 40 is provided on the seat body 3 of the infant safety seat 1 of this embodiment, the side guard 40 and the grip portion 240 may be provided or formed on a simple child seat.

Further, a side guard 40 whose one end comes in contact with and separates from the support portion 7 of the seat body 3 is a simple child seat.
It is also possible to provide. Also in this case, it is not necessary to form a seam in the cover attached to the child seat, the cover can be removed from the child seat, and the aesthetic appearance of the cover can be improved.

In this embodiment, the base body 2 and the leg portions 4 are provided.
However, in addition to this, it is possible to omit the base body 2 and directly provide the seat body 3 with the leg portion 4 having the same configuration as the above-described embodiment.

In this embodiment, the footrest 102 is integrally formed at the tip of the base body 2, but the footrest may be separately provided on the reinforcing rod 235 shown in FIGS.
Further, the front casters 106 and the rear casters 111 of the present embodiment are not applied only to the infant safety seat 1 that changes its form to the child seat state or the stroller state, but may be simply applied to the caster of a trolley or a simple stroller. .

In the above embodiment, the front caster arm 105 having the front tire 178 and the rear tire 2 are provided.
The rear caster arms 110 provided with 02 are rotated in opposite directions and are accommodated in the accommodation position on the side of the seat body 3. As shown in FIG. 69, one connecting rod 260 is rotatably connected to the front caster arm 105 and the rear caster arm 110, and the lever arm 261 is mounted on the connecting rod 260.

Then, as shown in FIG. 70, by operating the lever arm 261, the front caster arm 105 and the rear caster arm 110 are rotated in the same direction. Then, as shown in FIG. 71, the front caster arm 105 and the front caster 106 are accommodated in the accommodation positions on the left and right outer side portions of the seat portion 5 of the seat body 3, and the rear caster arm 110 and the rear caster 111 are accommodated in the back portion of the seat body 3. It may be configured to be housed in the housing positions of the left and right outer side portions in 6.

In this case, the front caster arm 105 and the front caster 10 can be easily manufactured with a small number of parts.
6, rear caster arm 110 and rear caster 111
Can be accommodated in each accommodation position.

In addition to this, as shown in FIG. 72, a crank member 262 is fixed to the rear caster arm 110 having the rear tire 202. A connecting rod 263 is rotatably provided on the front caster arm 105 having the front caster 106. Then, the crank member 262 and the connecting rod 263 are rotatably connected by the connecting pin 266a. Further, the operation pin 2 is connected to the connecting pin 266a.
One end of 64 is rotatably attached, and the other end is attached to the operation lever 26.
Attach to 5.

Then, as shown in FIG. 73, the front caster arm 1 is operated by operating the operation lever 265.
05 and the rear caster arm 110 are rotated in opposite directions. Then, as shown in FIG. 74, the front caster arm 105 and the rear caster arm 110 are accommodated in the accommodation positions on the left and right outer side portions of the seat portion 5 in the seat body 3.

At this time, the rotation amount of the front caster arm 105 and the rear caster arm 110 is set by the length of the crank member 262 and the like. Therefore, the front caster arm 105 and the rear caster arm 11 can be changed by appropriately changing the length of the crank member 262.
It is possible to freely change the setting of the rotation amount by which 0 and 0 rotate.

In addition to this, as shown in FIG. 75, the front caster arm 105 provided with the front tire 178 and the rear caster arm 110 provided with the rear tire 202 are connected to each other by a connecting rod 267 having a rotating shaft 266 at a substantially central portion thereof. You may connect. In this case, as shown in FIG. 76, the rotating shaft 266 is guided upward by operating an operating means (not shown), and the front caster arm 105 and the rear caster arm 110 are rotated in opposite directions.
Then, as shown in FIG. 77, the front caster arm 105 and the rear caster arm 110 are accommodated in the accommodation positions of the left and right outer side portions of the seat portion 5 of the seat body 3.

Further, in this embodiment, the front casters 106 and the rear casters 111 are housed at the housing positions on the left and right outer side portions of the support portion 7 in the seat portion 5. At this time, the lever arm 128, the connecting rod 120, and the protective cover 150 prevent the front caster 106 and the rear caster 111 from easily contacting. In addition to this, cover members are separately provided on the left and right outer side portions of the support portion 7 as necessary, and the front caster 106 and the rear caster 11 are provided.
1 may be covered.

Next, another example of the infant safety seat 1 of the present invention will be described. The same members as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 7
As shown in FIGS. 8 to 81, a pair of support pedestals 30 each having a cylindrical shape are formed on the horizontal frames 71 formed on both left and right sides of the base body 3.
0 is integrally formed. A rod locking plate 302 made of metal is vertically fixed to the pair of support pedestals 300 by a pair of mounting screws 301 so as to be parallel to the longitudinal direction of the horizontal frame 71. Further, a vertical slit 303 that opens downward is formed at the lower end of the rod locking plate 302. A reinforcing rib plate 304 formed on the horizontal frame 71 is inserted into the vertical slit 303. A plurality of rod engaging recesses 82 similar to those in the above-mentioned embodiment are formed on the front side of the rod locking plate 302.

As shown in FIGS. 81 and 82, a guide plate portion 305 is provided on the rear side portion of the rod locking plate 302.
Is formed to extend. The guide plate portion 305 is connected in a crank shape to the rod locking plate 302 via a bending piece 306. Further, the guide plate portion 305 is arranged so as to be separated from the lightening hole 70 side by the bent piece 306. A wire support plate 307 is formed on the side surface of the guide plate portion 305, the wire support plate 307 being punched on the side opposite to the lightening hole 70 side. The wire support plate 307 is curved so that its upper portion is open.

Further, on the rear side portion of the guide plate portion 305, a wire guide portion 308 orthogonal to the guide plate portion 305 is bent and formed. The wire guide portion 308 is bent and formed on the side opposite to the lightening hole 70 side. Further, a wire supporting slit 309 is formed on the tip side portion of the wire guide portion 308.

Therefore, the wire 91 which is operated by the operation of the lock release lever 51 is held by the wire supporting plate 307, and the wire 91 is inserted into the wire supporting slit 309. The wire 91 is connected to the arm lever 90 of the lock arm 89.

As a result, the operation of the wire 91 can be smoothly performed by the wire support plate 307 and the wire guide portion 308 by operating the lock release lever 51. Further, since the rod locking plate 302 is attached and fixed to the base body 2 as a separate body, the base body 2 can be easily integrally molded, and the manufacturing cost of the base body 2 can be suppressed accordingly. it can. Furthermore, since the wire support plate 307 can be made of metal, the engagement strength with the reclining rod 60 can be improved,
The seat body 3 can be supported in a stable state.
In the present embodiment, the wire support plate 307 is made of metal, but it may be made of resin such as reinforced plastic if necessary.

Further, as shown in FIGS. 78, 79 and 83, one end of one front caster arm 105 is made substantially the same as the length of the base body 2 in the width direction. A narrowing portion 310 is formed at the tip of one front caster arm 105 on one end side. The narrowing portion 310 is inserted into one end of the other front caster arm 105. Then, the recessed portion 10 of the base body 2
No. 0, a regulation collar 311 formed in a semicircular shape having substantially the same length as the width direction of the lightening recessed portion 100 is attached to the outer peripheral surface of the other front caster arm 105. The restriction collar 311, the narrowed-down portion 310 of the front caster arm 105 on one side, and the front caster arm 105 on the other side are crimped by rivets 108.

With this structure, the pair of front caster arms 105 provided on both the left and right sides of the base body 2 can be integrally rotated. Therefore, the pair of front caster arms 105 can be integrally rotated without using the auxiliary pipe 107 as in the above embodiment.
As a result, the number of parts of the auxiliary pipe 107 and the rivet 108 can be reduced, and the cost can be suppressed. Moreover, the assembling work for integrally rotating the pair of front caster arms 105 can be simplified.

Further, the pair of front caster arms 105 can be restricted by the restriction collar 311 so as not to move in the width direction of the base body 2. Moreover, the pair of front caster arms 105 are connected by the rivets 108, and at the same time, the other front caster arm 105 is connected.
A restriction collar 311 is attached to the outer peripheral surface of the. As a result, the assembly work can be performed efficiently.

One end of one rear caster arm 110 is made substantially the same as the length of the base body 2 in the width direction. And
A narrowing portion 312 is formed at the one end side tip portion of one rear caster arm 110. The narrowing portion 312 is inserted into one end of the other rear caster arm 110.

Then, in the lock arm housing 87 of the base body 2, the rivets 114 of the rear lock arm 113 attached to the other rear caster arm 110.
By the narrowing part 3 of one rear caster arm 110
12 and the other rear caster arm 110 are crimped.

With this structure, the pair of rear caster arms 110 provided on the left and right sides of the base body 2 can be integrally rotated. Therefore, as in the above embodiment,
The pair of rear caster arms 110 can be integrally rotated without using the auxiliary pipe 107. As a result, the auxiliary pipe 107 can be eliminated, the number of parts can be reduced, and the cost can be suppressed. Moreover, the assembling work for integrally rotating the pair of rear caster arms 110 can be simplified.

Further, the rear arm locks 113 can restrict the pair of rear caster arms 110 from moving in the width direction of the base body 2. Moreover, the rivet 114 connects the pair of rear caster arms 110, and at the same time, the rear arm lock 113 is attached to the outer peripheral surface of the other rear caster arm 110. As a result, the assembly work can be performed efficiently.

Next, another example of the mounting structure of the lever arm 128 rotatably mounted on the connecting rod 120 will be described. Since the basic structure of the connecting rod 120 is the same as that of the above-mentioned embodiment, the same members are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIGS. 84 to 86, this another example is characterized in that the extending member 83, the slant member 84 and the regulating pin 85 are not formed in the base body 2. Therefore, the attachment structure of the lever arm 128 rotatably attached to the connecting rod 120 is different from that of the above embodiment.

As shown in FIG. 90, the lock sliding member 13
A lock pin hole 315 is formed at 0. Guide lock pins 316 protruding to both sides in the thickness direction of the lock sliding member 130 are inserted into the lock pin holes 315. Further, the guide lock pin 316 is inserted into the guide elongated holes 317 formed on both side portions in the width direction of the rear linear portion 123 of the connecting rod 120 shown in FIGS. The guide elongated hole 317 is formed along the longitudinal direction of the connecting rod 120. The guide lock pin 316 is provided on the rear straight portion 12 of the connecting rod 120.
3 are projected on both sides in the width direction.

Further, on the rear-side straight line portion 123, which is on the front side of the portion where the guide elongated hole 317 is formed, slide elongated holes 318 are formed on the left and right sides of the connecting rod 120 along the longitudinal direction thereof. There is. This slide slot 318
A lever support pin 127 is inserted through the lever and protrudes on both sides in the width direction of the connecting rod 120. Then, the engaging recess 154 of the lock release 153 rotatably provided on the coupling cover 151 shown in FIGS. 90 and 92 and the lock sliding member 130.
When the lock sliding member 130 is restricted so as not to slide to the rear side, the guide lock pin 316 contacts one end (rear side) of the elongated guide hole 317. It is in the state of doing.

A lever lock auxiliary member 319 is rotatably provided on the lever support pin 127. A lever arm 128 is arranged so as to straddle the upper side of the lever lock auxiliary member 319. The lever arm 128 is connected by a lever support pin 127.

As shown in FIGS. 87 and 90, the lever lock assisting member 319 is provided with a pair of guide plates 320 disposed on both sides of the rear linear portion 123 of the connecting rod 120 in the width direction.
And a connecting auxiliary plate 321 for connecting a part of the upper side of the pair of guide plates 320.

A connecting slit 322 is obliquely formed in the upper portion of the pair of guide plates 320 on the rear side. The rotation restricting portion 159 of the lever arm 128 is inserted into the connecting slit 322. Therefore, the lever lock assisting member 319 is connected to the lever arm 1 via the rotation restricting portion 159.
28 is connected. Therefore, the lever arm 128
When the lever is rotated about the lever support pin 127, the lever lock auxiliary member 319 is also integrally rotated about the lever support pin 127.

Lock pin receiving holes 323 are formed in the pair of guide plates 320, respectively. The lock pin accommodating hole 323 is formed to have a substantially fan shape in the rear side direction with the lever support pin 127 as the center. The guide lock pins 316 protruding on both sides of the connecting rod 120 in the width direction are arranged in the lock pin accommodating holes 323.

Further, as shown in FIGS. 91 and 93, when the lever arm 128 is operated in the longitudinal direction of the connecting rod 120,
Since the lever support pin 127 slides along the slide long hole 318, the lever arm 128 and the lever lock auxiliary member 319 can be slid in the longitudinal direction of the connecting rod 120.

Further, as shown in FIGS. 87 and 90, when the lever lock auxiliary member 319 rotates about the lever support pin 127 in a state where the guide lock pin 316 is in contact with one end of the guide elongated hole 317. , Guide slot 317
A linear slide portion 324 for sliding the guide lock pin 316 is formed in the lock pin housing hole 323 on the other end side. Further, the lock pin housing hole 323 has a lock pin engaging hole 325 that engages with the guide lock pin 316.
Are formed adjacent to the slide portion 324.

As shown in FIG. 90, a rod connecting member 326 provided between the guide plates 320 is provided below the connecting rod 120 on the front side of the lever support pin 127. One end of the rod connecting member 326 is connected so that the swing rod 327 can swing.

As shown in FIGS. 88 and 90, the connecting cover 151 is narrower than the width of the connecting rod 120 and has a U-shaped cross section with an opening at the top.
0 is integrally formed. This spring housing member 33
0 is arranged so as to contact the back surface of the connecting rod 120. Then, a spring accommodating portion 331 is formed by the back surface of the connecting rod 120 and the spring accommodating member 330.
32 are provided.

The other end of the swing rod 327 is inserted so that the lever urging spring 332 in the spring accommodating portion 331 is always compressed. Therefore, the urging force of the lever urging spring 331 applies an urging force to the oscillating rod 327 to push the oscillating rod 327 out of the spring accommodating portion 330. This swing rod 32
The lever lock assisting member 319 and the lever arm 128 via the rod connecting member 326 by the urging force transmitted from
Is biased to rotate to the rear side.

Therefore, the rotation restricting portion 159 of the lever arm 128 is in contact with the upper surface of the connecting rod 120. Due to this contact, the rotation of the lever arm 128 and the lever lock auxiliary member 319 toward the rear side is restricted. The lever support pin 127 is positioned on the other end side of the elongated slide hole 318 by the urging force of the urging spring 132.

As shown in FIGS. 87 and 90, guide plate engaging recesses 333 are formed on both sides of the connecting cover 151 in the width direction. This guide plate engaging recess 333
The guide plate protrusion 334 of the guide plate 320 is inserted into
The guide plate engaging recess 333 and the guide plate protrusion 334 are adapted to engage with each other. In addition, the guide plate engaging recess 333
When the guide plate projection 334 is engaged with the guide plate protrusion 334, the lever arm 128 and the lever lock auxiliary member 319 are restricted from rotating about the lever support pin 127.

Further, as shown in FIGS. 91, 93, 97 and 98, the lever arm 128 is connected to the rear side while the lever arm 128 is resisted against the urging force of the lever urging spring 332.
Along the longitudinal direction of. Then, the lever support pin 127 slides along the slide long hole 318 to compress the biasing spring 132. Then, the lever support pin 127
Is located at one end of the slide slot 318. Then, the lever arm 128 and the lever lock auxiliary member 319 are slid to the rear side along the longitudinal direction of the connecting rod 120.

Therefore, the lever lock assisting member 31
9 slides the guide plate protrusion 3 of the guide plate 320.
34 and the guide plate engaging recess 333 of the connection cover 151 are engaged with each other. Therefore, the lever arm 128 and the lever lock auxiliary member 319 are restricted so as not to rotate about the lever support pin 127.

When the lever arm 128 slides rearward along the longitudinal direction of the connecting rod 120, the sliding protrusion 160 of the lever arm 128 presses the pressing sliding surface 155 of the lock release 153. Therefore, the lock release 153 is designed to rotate around the release shaft 153a. By the rotation of the lock release 153, the engagement recess 154 of the lock release 153 pushes the pressing surface 134 of the lock sliding member 130 against the urging force of the urging spring 132 toward the base end side of the rear linear portion 123. It is supposed to do.

Therefore, the lock sliding member 130 slides along the longitudinal direction of the connecting rod 120 toward the base end side of the rear linear portion 123, so that the lock sliding member 130 and the lock member 140 are engaged with each other. It will be in the released state. On the other hand, the guide lock pin 316 slides along the elongated guide hole 317 and comes into contact with the other end of the elongated guide hole 317.

When the infant safety seat 1 is lifted by grasping the lever arm 128 in this state, the connecting rod 120 and the lock member 140 are folded around the connecting support pin 142 as shown in FIG. 99. Has become.
At this time, the guide plate engaging recess 333 and the guide plate protruding portion 3
Since the lever arm 128 does not rotate around the lever support pin 127 due to the engagement with the lever arm 34,
The child safety seat 1 can be lifted in a stable state by grasping 8.

When the front caster 106 and the rear caster 111 are located at the accommodation positions on the left and right side portions of the seat portion 5 of the base body 2 by the folding operation of the connecting rod 120 and the lock member 140, the lock arm 89 and the rear arm lock 113 are formed. And are engaged. Therefore, the front caster 106 and the rear caster 111 are held at the storage position so as not to project to the lower surface of the base body 2.

When the operation of the lever arm 128 is released from this state, as shown in FIGS. 100 and 101, the lever support pin 127 is slid toward the front side along the slide long hole 318 by the urging force of the urging spring 132. The lever support pin 127 is located at the other end of the slide long hole 318. Therefore, the lever arm 128
Also, the lever lock auxiliary member 319 is provided on the rear side straight portion 123
It is designed to slide to the base end side.

By sliding the lever arm 128 and the lever lock auxiliary member 319, the sliding protrusion 160 is separated from the lock release 153, and the guide plate protrusion 334 is separated from the guide plate engaging recess 333.
Therefore, the lock sliding member 130 slides toward the tip of the rear linear portion 123 until the engaging recess 154 of the lock release 153 and the pressing surface 134 are engaged by the urging force of the urging spring 132. .

The guide lock pin 316 slides along the lock pin hole 315 as the lock sliding member 130 slides, and comes into contact with one end of the lock pin hole 315.

From this state, FIG. 96, FIG. 102, and FIG.
As shown in FIG. 3, the lever arm 128 is rotated to the front side while resisting the biasing force of the lever biasing spring 332. Although the guide lock pin 316 is initially arranged in the lock pin accommodation hole 323, when the lever arm 128 is rotated to some extent, the slide portion 324 of the lock pin accommodation hole 323 and the guide lock pin 316 are locked. The pins 316 interfere with each other.

The guide lock pin 316 and the slide portion 324 interfere with each other, whereby the guide lock pin 3
Reference numeral 16 is adapted to slide slightly along the guide elongated hole 317 toward the other end while resisting the biasing force of the biasing spring 132. At this time, the lock sliding member 130 also moves to the rear straight portion 1.
It is designed to slide slightly toward the base end side of 23.

When the lever arm 128 is further rotated to the front side, as shown in FIGS. 104 and 105, the guide lock pin 316 is locked in the lock pin receiving hole 323.
And the rotation of the lever arm 128 toward the front side is restricted. At this time, the guide lock pin 316 corresponds to the lock pin engagement hole 325. Then, the biasing force of the biasing spring 132 causes the lock sliding member 130 to slide toward the front end side of the rear-side linear portion 123 until it engages with the lock release 153.

By the sliding of the lock sliding member 130, the guide lock pin 316 is positioned at one end of the guide elongated hole 317. That is, the guide lock pin 316 enters the lock pin engagement hole 325, and the guide lock pin 3
16 and the lock pin engagement hole 325 are engaged with each other. The lever arm 128 is regulated so as not to rotate by the engagement of the lock pin engagement hole 325 and the guide lock pin 316. The swing rod 327 slides to the inner side of the spring accommodating portion 331 to compress the lever biasing spring 332.

Therefore, the urging force from the lever urging spring 332 is applied to the lever arm 128 via the swing rod 327 and the lever lock auxiliary member 319, and the lever arm 128 is urged to rotate to the rear side. Has been done. However, the engagement between the guide lock pin 316 and the lock pin engagement hole 325 restricts the lever arm 128 from rotating rearward.

When the lock release lever 51 is operated to release the engagement between the lock arm 89 and the rear arm lock 113, the connecting rod 120 and the lock member 140 rotate about the connecting support pin 142. At this time, as shown in FIG. 106, the locking protrusion 140 presses the push-down portion 136 of the lock sliding member 130 by the rotation of the lock member 140. By this pressing, the lock sliding member 130 is slid slightly toward the base end side of the rear-side linear portion 123. The slide of the lock slide member 130 causes the guide lock pin 316 to slide to the other end side of the elongated guide hole 317.

Then, the guide lock pin 316 comes out from the lock pin engagement hole 325 of the lock pin housing hole 323. That is, the engagement between the guide lock pin 316 and the lock pin housing hole 323 is released. Therefore, the lever arm 128 and the lever lock auxiliary member 319 are in a state of being rotatable around the lever support pin 127.

Then, the lever arm 128 and the lever lock assisting member 319 are rotated to the rear side by the biasing force of the lever biasing spring 332 that is compressed by the swing rod 327. Then, when the rotation restricting portion 159 of the lever arm 128 comes into contact with the upper surface of the connecting rod 120, the rotation is restricted. Therefore, the lever arm 1
28 is always biased to the rear side by the biasing force of the lever biasing spring 332.
It is located on the left and right sides of the center.

Next, the operation of the mounting structure of the lever arm 128 configured as described above will be described. First, the lever arm 128 of the infant safety seat 1 in the stroller state is urged by the urging force of the lever urging spring 332 so as to always rotate rearward.

When the lever arm 128 is pulled rearward while resisting the urging force of the lever urging spring 332, the lever support pin 127 slides along the slide elongated hole 318 and is positioned at one end of the slide elongated hole 318. To do. Therefore, the lever arm 128 and the lever lock auxiliary member 319 are slid to the rear side along the longitudinal direction of the connecting rod 120.

By sliding the lever lock assisting member 319, the guide plate projection 334 is moved to the guide plate engaging recess 33.
3, and the guide plate projection 334 and the guide plate engaging recess 333 are engaged with each other. Due to this engagement, the lever arm 128 and the lever lock assisting member 319 are restricted from rotating about the lever support pin 127.

Further, when the lever arm 128 slides to the rear side along the connecting rod 120, the sliding protrusion 160 presses the pressing sliding surface 155. Therefore, the lock release 153 rotates around the release shaft 153a. By the rotation of the lock release 153, the engagement recess 154 presses the pressing surface 134 of the lock sliding member 130 against the urging force of the urging spring 132 toward the base end side of the rear-side linear portion 123. Therefore, the lock sliding member 130 has the rear straight portion 1
It slides to the base end side of 23. Therefore, the lock sliding member 13
The engagement between 0 and the lock member 140 is released.

On the other hand, the guide lock pin 316 slides along the guide elongated hole 317 and contacts the other end of the guide elongated hole 317. In this state, when the lever safety arm 1 is grasped and the infant safety seat 1 is lifted, the connecting rod 120 and the lock member 140 perform a folding operation centering on the connecting support pin 142. At this time, the guide plate engaging recess 333
And the guide plate projection 334 are engaged, the lever arm 12
Since 8 does not rotate around the lever support pin 127, the infant safety seat 1 can be lifted in a stable state by gripping the lever arm 128.

By the folding operation of the connecting rod 120 and the lock member 140, the front caster 106 and the rear caster 111 are located at the accommodation positions on the left and right side portions of the seat portion 5 of the base body 2. Then, the lock arm 8
9 and the rear arm lock 113 are engaged. for that reason,
The front casters 106 and the rear casters 111 are held in the storage position so as not to project to the lower surface of the base body 2.

When the operation of the lever arm 128 is released from this state, the lever arm 128 and the lever lock auxiliary member 31 are kept until the lever support pin 127 comes into contact with the other end of the elongated slide hole 318 by the urging force of the urging spring 132.
9 slides on the base end side of the rear-side linear portion 123.

By sliding the lever arm and the lever lock auxiliary member 319, the sliding protrusion 160 is separated from the lock release 153. In addition, the guide plate protrusion 334
Is separated from the guide plate engaging recess 333. Therefore, the urging force of the urging spring 132 causes the engagement concave portion 154 and the pressing surface 1 to move.
The lock sliding member 130 slides to the front end side of the rear-side linear portion 123 until it is engaged with 34.

The guide lock pin 316 is locked in the lock pin hole 315 by sliding the lock sliding member 130.
And slides along to contact one end of the lock pin hole 315.

From this state, the lever arm 128 is rotated to the front side while resisting the biasing force of the lever biasing spring 332. Although the guide lock pin 316 is initially arranged in the lock pin accommodation hole 323, when the lever arm 128 is rotated to some extent, the slide portion 324 of the lock pin accommodation hole 323 and the guide lock pin 316 are locked. The pin 316 starts to interfere.

When the guide lock pin 316 and the slide portion 324 start to interfere with each other, the guide lock pin 316
Slides slightly to the other end of the guide slot 317. At this time, the lock sliding member 130 also slightly slides toward the base end side of the rear straight portion 123.

When the lever arm 128 is further rotated to the front side, the guide lock pin 316 engages with the lock pin housing hole 323. Therefore, the lever arm 128 is restricted so as not to rotate to the front side.
At this time, the lock pin engagement hole 325 is parallel to the longitudinal direction of the connecting rod 120. Further, the guide lock pin 316 that has interfered with the slide portion 324 and has been slid to the base end side of the rear side linear portion 123 until then is released from the interference with the slide portion 324.

Therefore, the biasing force of the biasing spring 132 causes the lock sliding member 130 to slide to the rear linear portion 123 until it engages with the lock release 153. By the sliding of the lock sliding member 130, the guide lock pin 3
16 is located at one end of the elongated guide hole 317. That is, the guide lock pin 316 enters the lock pin engagement hole 325, and the guide lock pin 316 and the lock pin engagement hole 325 are engaged with each other.

The lever arm 128 is restricted from rotating by the engagement of the lock pin engagement hole 325 and the guide lock pin 316. At this time, the swing rod 327
Slides toward the inside of the spring accommodating portion 331 to compress the lever urging spring 332.

Therefore, the urging force from the lever urging spring 332 is applied to the lever arm 128, and the lever arm 128 is urged to rotate to the rear side. However, since the guide lock pin 316 and the lock pin engagement hole 325 are engaged, the lever arm 128 does not rotate to the rear side.

The lever arm 128 is rotated to the front side so that the guide lock pin 316 and the lock pin engagement hole 3 are rotated.
When the lever arm 128 is locked so as not to rotate, the upper portion of the rear caster 111 is covered, as in the above-described embodiment.

Further, the lock release lever 51 is operated to release the engagement between the lock arm 89 and the rear arm lock 113, and the side guard 40 is grasped to lift the infant safety seat 1. Then, the connecting rod 120 and the lock member 140 rotate about the connecting support pin 142.
At this time, the locking projection 140 is pressed by the rotation of the locking member 140 to the pressing portion 136 of the locking sliding member 130. Due to this pressing, the lock sliding member 130 slightly slides toward the base end side of the rear-side linear portion 123. By the sliding of the lock sliding member 130, the guide lock pin 316 slightly slides toward the other end of the guide elongated hole 317.

By sliding the lock sliding member 130, the guide lock pin 316 is locked in the lock pin receiving hole 323.
Of the lock pin engaging hole 325. That is, the engagement between the guide pin 316 and the lock pin housing hole 323 is released. Therefore, the lever arm 128 and the lever lock auxiliary member 319 are in a state of being rotatable around the lever support pin 127.

At this time, the lever arm 128 and the lever lock auxiliary member 319 are urged by the urging force of the lever urging spring 332 which is compressed by the swing rod 327.
Rotates to the rear side. Then, when the rotation restricting portion 159 of the lever arm 128 comes into contact with the upper surface of the connecting rod 120, the rotation is restricted.

The lever arms 128 of the infant safety seat 1 in the stroller state are always located on the left and right side portions of the center of the side support portion 7 of the seat portion 5. Therefore, when the infant safety seat 1 is changed from the stroller state to the child seat state, the lever arm 128 is operated from the rear side of the infant safety seat 1.
As a result, the lever arm 128 can be held from the rear side in a position where it can be easily grasped, so that the operability of the infant safety seat 1 can be improved.

In the above embodiment, when the infant seat 1 is changed to the stroller state or the child seat state,
The regulation pin 85 regulates the lever arm 128 that is about to rotate due to the biasing force of the handle spring 129.

In this alternative example, the regulation pin 85 as in the above-mentioned embodiment can be eliminated. Therefore, it is possible to omit the extending member 83, the slanted member 84, and the regulating pin 85 that are integrally formed on the left and right sides of the base body 2.

As a result, the aesthetics of the infant safety seat 1 can be further improved. In addition, it is not necessary to integrally form the extending member 83, the slanted member 84, and the restriction pin 85, which are the protrusions, on the base body 2.
Can be easily integrally molded, and the cost can be suppressed.

Further, in the above-described embodiment, when the infant safety seat 1 in the stroller state is brought into the child seat state, the lever arm 128 is pivoted slightly rearward to pivot the lock release 153 to lock the slide. The engagement between the moving member 130 and the lock member 140 is released. From this state, the lever arm 128 is pulled diagonally upward to the rear side to bring the infant seat 1 into the child seat state.

In this another example, when the infant safety seat 1 in the stroller state is brought into the child seat state, the lever arm 128 is slid rearward by pulling the lever arm 128 slightly rearward. The lock release 153 is rotated by the sliding of the lever arm 128 to release the engagement between the lock sliding member 130 and the lock member 140. From this state, the lever arm 128 is pulled diagonally upward to the rear side to bring the infant seat 1 into the child seat state.

Therefore, in this alternative example, the lock release 153 can be rotated by simply pulling the lever arm 128 to the rear side to release the engagement between the lock sliding member 130 and the lock member 140. As a result, it is possible to further improve the operability for changing the infant safety seat 1 in the stroller state to the child seat state.

Further, as shown in FIGS. 92 and 95, the grip portion 158 of the lever arm 128 is formed so that its front side is opened. Further, a grip member 340 made of vinyl chloride resin is fitted on the front side of the grip portion 158.

As a result, it is possible to improve the feeling when the user grips the grip portion 158 of the lever arm 128. In addition, when the gripping portion 158 is gripped and the infant safety seat 1 is lifted, the hand can be prevented from slipping from the gripping portion 158 and the infant safety seat 1 can be reliably lifted. Further, the grip material 340 can be made of polyethylene, polypropylene, urethane, rubber or the like.

[0333]

As described above in detail, according to the present invention as set forth in claim 1, when the front and rear leg members of the seat body are rotated, the wheels of the leg members are left and right of the seat body. There is an excellent effect that the heights of the infant seats can be suppressed by accommodating the seats on both side portions, and the workability of placing or lowering the seat body on the vehicle seat can be improved.

According to the second aspect of the present invention, if the front leg member of the seat body is rotated to the rear side and the rear leg member is rotated to the front side, the wheels of the leg member are The height of the infant seat can be suppressed by accommodating it on both left and right side portions of the seat body. Moreover, since the width direction length of the front leg member is made shorter than the width direction length of the rear leg member, the side supports formed on both sides of the backrest portion and the seat portion of the vehicle seat do not interfere with each other. There is an excellent effect that the vehicle seat can be protected.

According to the third aspect of the present invention, there is an excellent effect that the wheels provided on the leg members can be housed by a small amount of rotation of the leg members.

[Brief description of drawings]

FIG. 1 is a perspective view of a baby safety seat according to the present invention in a stroller state.

FIG. 2 is a side view of the infant safety seat in a stroller state.

FIG. 3 is a bottom view of the infant safety seat in a stroller state.

FIG. 4 is a front view of the infant safety seat in a stroller state.

FIG. 5 is a rear view of the infant safety seat in a stroller state.

FIG. 6 is a side view of the child safety seat in a child seat state.

FIG. 7 is a front view of the child safety seat in a child seat state.

FIG. 8 is a rear view of the child safety seat in a child seat state.

FIG. 9 is a bottom view of the child safety seat in a child seat state.

FIG. 10 is a plan view of the child safety seat in a child seat state.

FIG. 11 is a perspective view showing a configuration of a seat body.

FIG. 12 is a perspective view showing each component attached to the seat body.

FIG. 13 is a partial plan sectional view showing a state in which a reinforcing plate is attached to a pair of belt support pieces.

FIG. 14 is a partial plan view showing a hook attached to the seat body.

FIG. 15 is a partial cross-sectional view showing a connection structure between a side guard and a connection piece of a support portion at a back portion and a hole of a cover.

FIG. 16 is a side view showing a configuration of a side guard.

FIG. 17 is a cross-sectional view showing the structure of a side guard.

FIG. 18 is a partial cross-sectional view showing that the side guard and the connecting piece are connected by a guard connecting pin.

FIG. 19 is a partial cross-sectional view showing a connected state of a front guard and a side guard.

FIG. 20 is a partial cross-sectional view showing a state in which a reinforcing plate is attached to a pair of belt support pieces.

FIG. 21 is a perspective view showing a state in which the other end of the side guard is separated from the support portion in the back portion.

FIG. 22 is a partial plan view showing the configuration of the base body.

FIG. 23 is a partial plan view showing the configuration of the base body.

FIG. 24 is a side view showing the configuration of the base body.

FIG. 25 is a side sectional view showing a configuration of a base body.

FIG. 26 is a side sectional view showing the structure of the base body.

FIG. 27 is an explanatory view showing a state in which the reclining rod is engaged with the rod engaging recess of the rod locking piece.

FIG. 28 is an explanatory view showing a state in which the reclining rod is pulled out from the rod engaging recess of the rod locking piece.

FIG. 29 is a partial cross-sectional view showing the structure of the lock arm provided on the base body.

FIG. 30 is a partial cross-sectional view showing a state where the lock arm is pushed up by the rear arm lock.

FIG. 31 is a partial cross-sectional view showing a state in which the tip of the lock arm and the rear arm lock are engaged with each other.

FIG. 32 is a partial cross-sectional view showing a state where the engagement between the tip of the lock arm and the rear arm lock is released by the rotation of the lock arm.

FIG. 33 is a partial cross-sectional view showing a state in which the front caster arm and the auxiliary pipe and the rear caster arm and the auxiliary pipe are connected and fixed in the base body.

FIG. 34 is a partial perspective view showing a state in which the front caster arm and the auxiliary pipe are connected and fixed in the base body.

FIG. 35 is a partial side view showing a state in which the front caster arm and the rear caster arm are in a stroller state and are locked by the connecting rod and the lock member.

FIG. 36 is a partial plan sectional view showing a connecting structure of a connecting rod and a lock member.

FIG. 37 is a partial side sectional view showing the configurations of the connecting rod and the lock member.

FIG. 38 is a partial perspective view showing the engagement relationship between the lock sliding member and the lock member in the connecting rod.

FIG. 39 is a partial side cross-sectional view showing the engagement relationship between the lock sliding member and the lock member in the connecting rod.

FIG. 40 is a partial side sectional view showing a state where the engagement between the lock sliding member and the lock member in the connecting rod is released by the lever arm.

FIG. 41 is a partial side sectional view showing a state in which the engagement between the lock sliding member and the lock member in the connecting rod is released by the lever arm.

FIG. 42 shows a state in which the lever safety arm is lifted to rotate the connecting rod and the lock member about the connecting support pin, and the front caster arm and the rear caster arm are folded to change the infant safety seat to the child seat state. It is a partial side sectional view.

FIG. 43 is a partial side view showing that the infant safety seat is changed to a child seat state, the lever arm rotates above the rear caster, and the rotation is restricted by a restriction pin.

FIG. 44 is a partial side cross-sectional view showing that the infant safety seat has changed to a child seat state, the lever arm rotates above the rear caster, and the rotation is restricted by a restriction pin.

FIG. 45 is a partial side view showing the configuration of the front caster.

FIG. 46 is a partial side cross-sectional view showing the configuration inside the front caster.

FIG. 47 is a partial side cross-sectional view showing a state in which the front caster bracket is sunk between a pair of front tires by the operation of the suspension arm.

FIG. 48 is a partial side view showing a state in which the front caster is prevented from turning due to the engagement relationship between the turning lock arm and the turning restriction protrusion.

FIG. 49 is a partial side view showing a state in which the front caster can be turned by disengaging the turning lock arm and the turning restriction protrusion.

FIG. 50 is a side view of the front caster bracket.

FIG. 51 is a partial cross-sectional view showing the shape of the protection guide cover formed on the front caster bracket.

52 is a partially cutaway front view showing the shape of the wheel of the front tire. FIG.

FIG. 53 is a side view showing the configuration of the rear caster.

FIG. 54 is a partial side sectional view showing the configuration of the rear caster.

FIG. 55 is a partial side cross-sectional view showing a state in which the rear caster bracket is sunk between the pair of rear tires by the operation of the suspension arm.

FIG. 56 is a partial side cross-sectional view showing a state in which the lock pin of the rotation restricting member is not fitted in the engagement recess of the rotation lock portion.

FIG. 57 is a partial side sectional view showing a state in which the lock pin of the rotation restricting member is fitted in the engagement recess of the rotation lock portion.

58 is a cross-sectional view taken along the line A1-A1 of FIG. 57.

FIG. 59 is a side view of the rear caster bracket.

FIG. 60 is a partial cross-sectional view showing the shape of a protection guide cover formed on the rear caster bracket.

FIG. 61 is a partially cutaway front view showing the shape of the wheel of the rear tire.

FIG. 62 is a perspective view showing a state in which a child safety seat in a child seat state is mounted so as to face a vehicle seat.

FIG. 63 is a perspective view showing a state in which a child safety seat in a child seat state is mounted so as to correspond to the orientation of the vehicle seat.

FIG. 64 is a partial perspective view showing another example in which a reinforcing rod is provided on the front caster arm.

FIG. 65 is a partial side view showing that the reinforcing rod provided on the front caster arm is housed in the housing space of the base body.

FIG. 66 is a perspective view showing another example of the shape of the seat body.

FIG. 67 is a perspective view showing another example of the shape of the seat body.

FIG. 68 is a perspective view showing another example of the shape of the seat body.

FIG. 69 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 70 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 71 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 72 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 73 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 74 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 75 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 76 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 77 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 78 is a partial plan view showing another example of the base body, the front caster arm, and the rear caster arm.

FIG. 79 is a partial plan view showing another example of the base body, the front caster arm, and the rear caster arm.

FIG. 80 is a cross-sectional view showing another example of the structure of the base body.

81 is a front view of the rod locking plate. FIG.

82 is a partial perspective view of a rod locking plate. FIG.

FIG. 83 is a partial perspective view showing the connection structure of the front caster arm.

FIG. 84 is a side view of another example of a child safety seat in a stroller state.

FIG. 85 is a front view of another example of a child safety seat in a stroller state.

FIG. 86 is a side view showing another example of a child safety seat in a child seat state.

FIG. 87 is a partial perspective view showing the connection structure of the lever lock assisting member and the connecting bar.

88 is a partial perspective view showing the engagement relationship between the protective cover and the lever lock auxiliary member. FIG.

FIG. 89 is a side view of a connecting rod as another example.

FIG. 90 is a partial cross-sectional view showing a state where the lock sliding member and the lock member are engaged with each other.

FIG. 91 is a partial cross-sectional view showing a state in which the engagement between the lock sliding member and the lock member is released by the lock release based on the operation of the lever arm.

FIG. 92 is a partial cross-sectional view showing a state where the lock sliding member and the lock member are engaged with each other.

FIG. 93 is a partial cross-sectional view showing a state in which the engagement between the lock sliding member and the lock member is released by the lock release based on the operation of the lever arm.

FIG. 94 is a partial side view showing a state in which the lock sliding member and the lock member are engaged with each other.

FIG. 95 is a partial cross-sectional view showing a state where the lock sliding member and the lock member are engaged with each other.

96 is a partial side view showing a state in which the connecting bar and the locking member are folded around the connecting support pin, and the lever arm covers the upper portion of the rear caster. FIG.

FIG. 97 is a partial cross-sectional view showing a state in which the lock sliding member and the lock member are disengaged by the lock release based on the operation of the lever arm.

FIG. 98 is a partial side view showing a state in which the lock sliding member and the lock member are disengaged by the lock release based on the operation of the lever arm.

FIG. 99 is a partial cross-sectional view showing a state in which the connecting bar and the lock member are folded around the connecting support pin and the lever arm and the protective cover are engaged with each other.

FIG. 100 is a partial cross-sectional view showing a state in which the connection bar and the lock member are folded around the connection support pin and the engagement between the lever arm and the protective cover is released.

101 is a partial cross-sectional view showing a state in which the connection bar and the lock member are folded around the connection support pin and the engagement between the lever arm and the protective cover is released. FIG.

FIG. 102 is an explanatory diagram showing that the lever arm is rotated to the front side about the lever support pin.

FIG. 103 is an explanatory view showing that the lever arm is rotated around the lever support pin toward the front side.

FIG. 104 is a partial cross-sectional view showing a state in which the lever arm is locked so as not to be rotatable by the engagement of the guide lock pin and the guide lock pin engagement hole.

FIG. 105 is a partial cross-sectional view showing a state in which the lever arm is locked so as not to be rotatable by the engagement of the guide lock pin and the guide lock pin engagement hole.

FIG. 106 is a partial cross-sectional view showing that the lock sliding member slides by the lock member, the engagement between the guide lock pin and the guide lock pin engagement hole is released, and the lever arm rotates.

[Explanation of symbols]

3 ... Seat body, 105 ... Front caster arm as leg member, 106 ... Front caster as wheel,
110 ... Rear caster arm as a leg member, 111 ...
Rear casters as wheels, 177 ... Castor shafts as rotation support shafts, 201 ... Caster shafts as rotation support shafts

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 11, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of the invention] Wheel leg structure

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel leg structure.

[0002]

2. Description of the Related Art Generally, a vehicle seat of an automobile is designed based on an adult's physique. When a small infant sits down, the position of the body is lowered, and even if a seat belt is used, the infant is firmly seated. It was difficult to hold his body.
Therefore, an infant seat (child seat) is placed on an ordinary vehicle seat so that the infant can firmly hold his / her body when sitting.

Further, in recent years, with the widespread use of automobiles, the number of opportunities for children to go out has increased, and a child seat that can also be used as a stroller has been proposed. Then, when getting off the car and moving with the infant, the child seat is used as a stroller, and the infant is moved in the stroller. When this kind of child seat is placed in the vehicle, the inside of the vehicle becomes narrower, and therefore there is a demand to make the child seat as compact as possible.

As a countermeasure against this, the actual construction of Shokai 62-13863
As disclosed in Japanese Patent Publication No. 8, there has been proposed one in which a leg member is pivoted to the lower portion of the infant seat so that the front wheels and the rear wheels are accommodated in the lower portion of the infant seat.

[0005]

However, if the front wheel and the rear wheel are accommodated in the lower portion of the infant seat, the height of the infant seat increases accordingly. Therefore, when the infant seat is placed on the vehicle seat, the distance between the infant seat and the vehicle ceiling becomes narrow, and the work of placing and lowering the infant seat on the vehicle seat is very troublesome. There is. Further, after the leg members of the infant seat are rotated to accommodate the front wheels and the rear wheels, the infant seat is placed on the vehicle seat, but the front wheels and the rear wheels come into contact with the vehicle seat and damage the vehicle seat. There is a problem that causes it.

Further, there is also a demand for accommodating the front wheels and the rear wheels by minimizing the amount of rotation of the leg members of the infant seat. The present invention has been made to solve the above problems, and a first object thereof is to provide a wheel leg structure having improved workability when loading and unloading an infant seat from a vehicle seat. It is in.

A second object of the present invention is to provide a wheel leg structure in which the vehicle seat is prevented from being damaged by the wheels accommodated in the infant seat. A third object is to provide a wheel leg structure capable of accommodating the wheel on the left and right outer side portions of the seat body with a small amount of rotation of the leg member.

[0008]

In order to solve the above problems, the invention according to claim 1 is provided with U-shaped leg members on the front side and the rear side of the seat body so that the seat body is rotatable. In addition, in the wheel leg structure in which wheels are provided at the front ends of the front and rear leg members, the width direction length of the leg members is made larger than the width direction length of the seat body, and the leg members are The gist of the invention is that the wheels are rotated to be housed in the left and right outer side portions of the seat body.

According to a second aspect of the present invention, U-shaped leg members are provided on the front side and the rear side of the seat body so as to be rotatable, and the tip ends of the front side and rear side leg members are provided. In the leg structure of the wheel with the wheel provided in,
The width in the width direction of the rear side leg member is made larger than the length in the width direction of the front side leg member, and the wheel of the front side leg member is rotated to the rear side of the seat body to move the wheel to the seat body. The gist of the invention is that the rear leg member is housed in the outer side part and the wheel of the rear leg member is rotated to the front side of the seat body to house the wheel in the front outer side part of the seat body.

According to a third aspect of the present invention, U-shaped leg members are provided on the front side and the rear side of the seat body so as to be rotatable, and the tip ends of the front and rear leg members are provided. In the leg structure of the wheel with the wheel provided in,
The gist of the invention is that when the leg member is arranged at the traveling position, the rotation support shaft of the wheel is arranged at a position offset from the extension line of the leg member in the rotation direction when the leg member is accommodated.

[0011]

According to the first aspect of the invention, the U-shaped leg members provided on the front side and the rear side of the seat body are rotated. At this time, the widthwise length of the leg member is larger than the widthwise length of the seat body.
Therefore, the wheels provided on the leg members are arranged and accommodated on the left and right outer side portions of the seat body. Therefore, the wheels of the leg members do not protrude from the lower surface of the seat body.

According to the second aspect of the present invention, the U-shaped leg member on the front side of the seat body is rotated to the rear side of the seat body. Further, the rear side U-shaped leg member of the seat body is rotated to the front side of the seat body. At this time, the length of the front leg member in the width direction is shorter than the length of the rear leg member in the width direction, so that the leg members do not interfere with each other. Further, the front and rear leg members are housed in the left and right outer side portions of the seat body. Therefore, the wheels of the leg members do not protrude from the lower surface of the seat body.

According to the third aspect of the invention, the U-shaped leg members provided on the front side and the rear side of the seat body are arranged at the traveling position. A rotation support shaft for the wheel is arranged at a position offset from the extension line of the leg member in the rotation direction when the leg member is accommodated. Therefore, it is possible to reduce the amount of rotation of rotating the leg member to store the leg member in the storage position where the wheels do not project from the lower surface of the seat body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIGS.
It will be described with reference to FIG. As shown in FIGS. 1 and 2, a baby safety seat 1 of this embodiment includes a resin seat body 2 and
It is composed of a leg portion 3 provided on the seat body 2. The seat body 2 includes a resin base body 4 and a body sheet 5 provided on the upper surface of the base body 4.

As shown in FIG. 1, the main body sheet 5 is formed by integrally forming a seat portion 6 and a back portion 7 provided on the rear side of the seat portion 6 in a curved shape. Support portions 8 are integrally formed on both the left and right sides of the seat portion 6, facing upward, and on the left and right sides of the back portion 7, facing the front side of the body sheet 5. Further, a cloth-made cover 9 having a cushioning property is attached to the surface of the main body sheet 5. Further, resin side guards 10 are installed on the support portions 8 on both the left and right sides.

As shown in FIGS. 1, 3 and 4, the left and right sides of the seat portion 6 project to the back side, and the left and right sides of the back portion 7 project to the rear side. Are integrally formed. An arrangement space 12 is formed between the pair of protrusions 11 that protrude to the back side of the seat 6. A base body 4 is arranged in the arrangement space 12. The base body 4 has a rectangular shape in plan view, and its longitudinal direction is aligned with the front and rear side directions of the body sheet 5. Further, the base body 4 is formed with a lightening hole 15 having a quadrangular shape in the thickness direction, and the lightening hole 15 forms the base body 2 with a pair of a horizontal frame 16, a front frame 17 and a rear frame 18. Has been done. Further, the pair of lateral frames 16, the front frame 17, and the rear frame 18 are integrally formed.

As shown in FIG. 6, an extension member 20 which is orthogonal to the horizontal frames 16 is integrally formed on the outer side portions of both the horizontal frames 16, and a rear side slant is formed at a tip end portion of the extension members 20. An inclined member 21 extending upward is integrally formed. Further, a cylindrical regulation pin 22 orthogonal to the oblique member 21 is integrally formed on the outer side surface of the distal end of the oblique member 21. On the left and right sides of the rear frame 18, there are formed arm lock accommodating portions 23 whose upper portions are opened. The arm lock storage section 23
A semicircular arm reinforcing portion 24 having an open top is integrally formed on the side portion of the. Reinforcing ribs 25 are integrally formed in the arm reinforcing portion 24. Further, as shown in FIG. 4, a rear frame blind cover 26 is provided on the upper surface of the rear frame 18 and the upper surface of the arm reinforcing portion 24.

As shown in FIGS. 6 and 7, caster arm insertion holes 27 are formed in the arm reinforcing portion 24 and the rear frame blind cover 26 corresponding to the arm reinforcing portion 24. Similarly, the rear frame 18 has a caster arm insertion hole 2
8 is formed. The front frame 17 is formed with lightening recessed portions 29 on the left and right sides, the upper portion of which is open. A caster arm insertion hole 30 is formed in the front frame 17 corresponding to the lightening recess 29. A front frame blind cover (not shown) is provided on the front side upper surface of the front frame 17 so as to cover the upper surface of the lightening recess 29.

As shown in FIGS. 1, 2 and 6, the caster arm insertion hole 30 has a front caster arm 31 which constitutes a front leg member curved in a substantially L shape.
Has one end rotatably inserted. Front casters 32 as wheels are provided at the other end of the front caster arm 31. In addition, the front caster arm 31 inserted into the caster arm insertion holes 30 on both the left and right sides.
Both ends of a connecting pipe 33, which constitutes a front leg member having an outer diameter smaller than the inner diameter of the front caster arm 31, are inserted in. The length of the connecting pipe 33 is substantially the same as the length of the front frame 17 in the width direction.

The end portion of the connecting pipe 33 and the one end portion of the front caster arm 31 are overlapped with each other in the lightening recess 29 of the front frame 17. Then, in the lightening recess 29,
The connecting pipe 33 and the front caster arm 31 are crimped by a pair of rivets 34. Therefore, the pair of front caster arms 31 provided on the left and right sides of the front frame 17 in the base body 2 are interlocked with each other. Also, a pair of front caster arms 3
1 and the connecting pipe 33 constitute a front leg member, and the front leg member is formed in a U shape,
It is larger than the length in the width direction of the base body 4 which constitutes the seat body 2.

As shown in FIGS. 1 and 6, the rear caster arm insertion holes 27 and 28 formed in the rear frame 18 are rear caster arms 35 which form rear side leg members curved in an approximately L shape. Has one end rotatably inserted. Rear casters 36 as wheels are provided at the other end of the rear caster arm 35.

The caster arm insertion holes 2 on both the left and right sides
The rear caster arms 35 inserted into the Nos. 7 and 28 have both ends of a connecting pipe 37 forming a rear leg member having an outer diameter smaller than the inner diameter of the rear caster arm 35. The length of the connecting pipe 37 is substantially the same as the length of the rear frame 18 in the width direction. Therefore, the connecting pipe 37
Of the rear caster arm 35 and one end of the rear caster arm 35 are overlapped with each other in the arm lock storage portion 23 formed in the rear frame 18. The connecting pipe 37 and the rear caster arm 35 are caulked by a pair of rivets 38. for that reason,
A pair of rear caster arms 35 provided on both the left and right sides of the base body 2 are adapted to rotate together.
In addition, a pair of rear caster arms 35 and a connecting pipe 37
The rear-side leg member is formed of a U-shaped member, and the rear-side leg member is formed in a U shape, and is longer than the length of the base body 4 constituting the seat body 2 in the width direction.

The length of the pair of front caster arms 31 in the U-shape forming the front leg members is in the width direction, and the pair of rear casters in the U-shape forming the rear leg members. The length of the arm 35 in the width direction is longer. Therefore, the rear caster 36 is arranged at a position overhanging the front caster 32 in the width direction of the base body 2.

As shown in FIGS. 1 and 2, a caster top 40 forming a front caster 32 is attached and fixed to the other end of the front caster arm 31. The caster top 40 is the central axis L of the front caster arm 31.
It is curved so as to be positioned inside 1 of the seat 1, that is, on the rear side of the seat 6. A front caster bracket 41 is rotatably provided below the caster top 40. The front caster bracket 41 is rotatably provided with a pair of front tires 43 via a caster shaft 42 as a rotation support shaft. Therefore, the caster top 40 has the center axis L of the front caster arm 31.
The caster shaft 42 is arranged at a position offset to the rear side from the central axis L1 by being curvedly formed to the rear side from 1.

A swivel lock arm 45 is rotatably supported on the caster top 40 by a support shaft 46.
Further, as shown in FIG. 2, the swing lock arm 45 can be engaged with a swing restricting protrusion 47 integrally formed on the top of the front caster bracket 41. Then, by engaging the turning lock arm 45 and the turning restriction protrusion 47,
The front tire 43 is restricted so that it cannot turn, and when the engagement is released, the front tire 43 turns.

As shown in FIGS. 1 and 2, a rear caster bracket 48 constituting a rear caster 36 is attached and fixed to the other end of the rear caster arm 35. or,
The caster top 49 of the rear caster bracket 48 is curved so as to be positioned inside the center line L2 of the rear caster arm 35, that is, on the front side of the seat portion 6. The rear caster bracket 48 is rotatably provided with a pair of rear tires 51 via a caster shaft 50 serving as a rotation support shaft. Since the caster top 49 is curved toward the front side with respect to the central axis L2 of the rear caster arm 35, the caster shaft 50 is arranged at a position offset to the front side with respect to the central axis L2. or,
A rotation restricting operation lever 52 projecting to the front side is arranged between the pair of rear tires 51. By operating the rotation regulating operation lever 52, the pair of rear tires 51 can be rotated or locked so as not to rotate.

As shown in FIGS. 1 and 2, one end of an aluminum connecting rod 53 having a square hollow shape is disposed on the outer side of the center of the front caster arm 35. One end of the connecting rod 53 is supported by a shaft support pin 54, and the connecting rod 53 is rotatably supported with respect to the front caster arm 31. The connecting rod 53 is obliquely attached so as to face upward toward the rear side.
Further, the connecting rod 53 connects the front straight portion 55, the rear straight portion 56 positioned outside the front straight portion 55 and parallel to the front straight portion 55, and the front straight portion 55 and the rear straight portion 56. And the slanted portion 57.

A lever arm 59 is rotatably provided on the rear straight portion 56 by a lever support pin 58. A handle spring (not shown) for urging the lever arm 59 toward the front side of the main body seat 5 is provided between the lever support pin 58 and the lever arm 59.
The lever arm 59 is urged toward the front side of the main body seat 5 by the urging force of the handle spring and abuts against the regulation pin 22 to regulate its rotation. Therefore, the lever arm 59 is located on the outer side of the center of the left and right support portions 8 of the seat 6.

On the other hand, a lock member 60 made of stainless steel or iron is fixed to the inner side portion of the rear caster arm 35 by a pair of rivets (not shown). The tip end side of the lock member 60 is formed so as to rise obliquely toward the front side. Further, the tip of the lock member 60 is formed so as to be inclined downward toward the front side. The tip end side of the lock member 60 is rotatably connected to the rear side linear portion 56 of the connecting rod 53 by a connecting support pin 61. The front caster arm 31 is connected to the rear caster arm 35 via a connecting rod 53 and a lock member 60. At this time, the formation of the slanted portion 57 of the connecting rod 53 absorbs the difference in the length between the front caster arm 31 and the rear caster arm 35 in the width direction, so that the connection is possible. The connecting rod 53 and the lock member 60 are connected to each other by the connecting support pin 61.
The folding operation is performed centering around, and the connection support pin 61 moves upward. At this time, the front caster arm 31 and the rear caster arm 35 are pivoted inward so as to intersect with each other and folded.

In the state shown in FIGS. 1 and 2, the connecting rod 5
The rear linear portion 56 of 3 and the lock member 60 are locked by a first lock mechanism (not shown). for that reason,
Even if the infant safety seat 1 is lifted by holding the pair of side guards 10 provided on both the left and right sides, the connecting rod 53 and the lock member 60 are locked around the connecting support pin 61 so as not to perform a folding operation. There is. Therefore, the connection support pin 6
1 does not move upward, and the front caster arm 31 and the rear caster arm 35 are prevented from being folded in the inward direction intersecting with each other. The locking member 60
A protective cover 62 made of resin is attached to the. Furthermore,
A connection protection cover 63 made of resin is attached and fixed to the rear straight portion 56 where the connection rod 53 and the lock member 60 are connected by the connection support pin 61.

Further, the rear straight portion 56 of the connecting rod 53 is provided.
A lock release 64 is rotatably provided on the upper part of the. When the lever arm 59, which is in contact with the restriction pin 22, is rotated to the rear side and brought into contact with the lock release 64, the lock release 64 is rotated. When the lock release 64 rotates, a first lock mechanism (not shown) operates to release the lock. By releasing this lock, the connecting rod 53 and the lock member 60 are brought into a state in which they can be folded around the connecting support pins 61, and by this folding operation, the front caster arm 31 and the rear caster arm 35 can be folded inside each other. It has become.

When the front caster arm 31 and the rear caster arm 35 are folded inward so as to intersect with each other, the front caster 32 and the rear caster 36 shown in FIG. 5 are rotated to a position where they do not project downward from the lower surface of the base body 2. Is able to. At this time, the front caster 32 and the rear caster 36 are positioned at a storage position that does not project downward from the lower surface of the base body 4 by the locking of a second locking mechanism (not shown). As a result, the front casters 32
Also, the rear casters 36 are arranged at the accommodation positions on the left and right outer side portions of the support portion 7, so that the infant safety seat 1 can be changed from the stroller state to the child seat state.

If the second guard mechanism (not shown) is operated to release the lock while the side guard 10 is gripped and the infant safety seat 1 is lifted, the front caster arm 31 moves to the front side by its own weight. It rotates so as to project to the lower surface of the base body 4. Similarly, the rear caster arm 35 pivots to the rear side by its own weight and projects to the lower surface of the base body 4. Then, from the state where the front caster arm 31 and the rear caster arm 35 hang down, the child safety seat 1
Is lowered to the ground, and the front caster arm 31 and the rear caster arm 35 are expanded in the direction in which they are separated from each other by the weight of the infant safety seat 1. Then, the front caster arm 31 and the rear caster arm 35 are positioned at the traveling position. At this time, the connecting rod 53 and the lock member 60 are locked by the first locking mechanism (not shown). Therefore, the connecting rod 53 and the lock member 60 do not fold around the connecting support pin 61, and the connecting support pin 61 is locked so as not to move upward. Therefore, the front caster arm 31 and the rear caster arm 35 are not folded even if the side guard 10 is gripped and the infant safety seat 1 is lifted.

As a result, the child safety seat 1 which has been in the child seat state can be put in the stroller state. Now, in FIG. 1, the infant safety seat 1 is in a stroller state, and when the lever arm 59 is grasped and pivoted rearward from this state, the arm 59 pivots the lock release 64 to move the first arm (not shown). 1
The lock mechanism of is operated. Based on this operation, the connecting rod 53 and the lock member 60 are in an unlocked state in which the connecting rod 53 can be folded around the connecting support pin 61. When the lever arm 59 is lifted from this state, the connecting rod 53 and the lock member 60 perform a folding operation around the connecting support pin 61,
The connection support pin 61 moves upward. Therefore, the front caster arm 31 and the rear caster arm 35 are folded inward so as to intersect each other.

When the front caster arm 31 and the rear caster arm 35 are rotated to the position shown in FIG. 5, the second lock mechanism prevents the front caster 32 and the rear caster 36 from protruding downward from the lower surface of the base body 4. Positioned at. Therefore, the front caster 32 and the rear caster 36 are held so as not to project from the lower surface of the base body 4, and the child safety seat 1 is in the child seat state. After the child safety seat 1 in the child seat state is placed on a vehicle seat of a vehicle (not shown), the infant safety seat 1 is attached by a seat belt (not shown) of the vehicle.

On the contrary, if the infant safety seat 1 is removed from the vehicle seat, the side guard 10 is grasped and the infant safety seat 1 is lifted, and the second lock mechanism is operated to unlock, the accommodation is carried out. The front caster 32 and the rear caster 36 held in the position are the base body 4
Project to the bottom surface of. After that, if the infant safety seat 1 is put down on the ground, the infant seat 1 becomes a stroller state.

Therefore, when the infant safety seat 1 is in the child seat state, the front casters 32 and the rear casters 36 are arranged at the accommodation positions on the left and right outer side portions of the main body seat 5. Therefore, the front casters 32,
Rear caster 36 and front caster arm 3
1. The rear caster arm 35 is not arranged below the seat body 2. As a result, since the height of the child safety seat 1 in the child seat state can be reduced, it is possible to easily take out the infant safety seat 1 from the inside of the vehicle or put it in the vehicle.

Further, the front caster arm 31 and the rear caster arm 35 are located on the left and right outer side portions of the main body seat 5, and the front caster 32 from the lower surface of the base main body 2.
Also, the rear caster 36 is prevented from protruding. Therefore, the front caster 32 and the rear caster 36 can be prevented from coming into contact with the vehicle seat (not shown). As a result, the vehicle seat can be prevented from becoming dirty.

Furthermore, the length of the front caster arm 31 and the rear caster arm 35 in the width direction is equal to or longer than the length of the seat body 3 in the width direction. or,
Front caster arm 31 and rear caster arm 3
When the child safety seat 1 is in the child seat state when the child safety seat 1 is in the storage position, the front caster arm 31 and the rear caster arm 35 are in a state of protruding slightly below the lower surface of the base body 2.

As a result, when the child safety seat 1 in a child seat state is placed on the vehicle seat, the front caster arm 31 and the rear caster arm 35 also contact the vehicle seat to support the seat body 2, so The safety seat 1 can be placed on the vehicle seat in a more stable state.

Further, the length of the rear caster arm 35 in the width direction is larger than the length of the front caster arm 31 in the width direction. As a result, the front caster arm 31
Even if the rear caster arms 35 are folded in the directions intersecting with each other, the rear caster arms 35 can be prevented from interfering with each other.

Further, the length of the front caster arm 31 in the width direction is shorter than the length of the rear caster arm 35 in the width direction. Therefore, when the child safety seat 1 in the child seat state is placed on the vehicle seat, the front casters 32 do not interfere with the side supports formed on both sides of the back of the vehicle seat so as not to damage the side supports. can do.

Further, the caster shaft 42 is arranged at a position offset rearward from the central axis L1 of the front caster arm 31. And the rear caster arm 3
The caster shaft 50 is arranged at a position offset to the front side from the central axis L2 of FIG.

As a result, when the front caster 32 and the rear caster 36 are arranged at the accommodating position, the front caster 32 and the rear caster 36 can be arranged at the accommodating position by a small turning amount of the front caster arm 31 and the rear caster arm 35. it can. Moreover, it is possible to prevent the front casters 32 and the rear casters 36 from protruding from the lower surface of the base body 2 and from coming into contact with the vehicle seat.

In the above embodiment, the front caster arm 31 provided with the front tire 43 and the rear caster arm 35 provided with the rear tire 51 are rotated in directions intersecting with each other, and are arranged at the accommodation position on the side of the seat body 2. As shown in FIG. 8, the front caster arm 31
Also, one connecting rod 65 is rotatably connected to the rear caster arm 35, and the lever arm 66 is mounted on the connecting rod 65.

Then, as shown in FIG. 9, the front caster arm 3 is operated by operating the lever arm 66.
1 and the rear caster arm 35 are rotated in the same direction. Then, as shown in FIG. 10, the front caster arm 31 and the front caster 32 are attached to the seat body 2
The rear caster arm 35 and the rear caster 36 may be arranged at the accommodation positions of the left and right outer side portions of the seat portion 6, and the rear caster arm 35 and the rear caster 36 may be disposed at the left and right outer side accommodation portions of the back portion 7 of the seat body 2.

In this case, the front caster 32 and the front caster 36, the rear caster arm 31, and the rear caster 36 can be easily arranged at the respective accommodation positions with a small number of parts. Further, in this case, the length in the width direction of the pair of front caster arms 31 having a U-shape,
The length in the width direction of the pair of U-shaped rear caster arms 35 may be at least larger than the length in the width direction of the seat body 2. Furthermore, a pair of front caster arms 3
It is also possible to make the lengths of the one and the pair of rear caster arms 35 in the width direction equal.

In addition to this, as shown in FIG. 11, a lever arm 68 is fixed to the rear caster arm 35 provided with the rear tire 51. And the front casters 32
A connecting rod 69 is rotatably provided on the front caster arm 31 provided with. Then, the lever arm 68 and the connecting rod 69 are rotatably connected by the connecting support pin 70. Further, one end of the operation rod 71 is rotatably attached to the connection support pin 70, and the other end of the operation rod 71 is attached to the operation lever 72.

Then, as shown in FIG. 12, the front caster arm 31 is operated by operating the operation lever 72.
Also, the rear caster arm 35 is rotated inwardly so as to intersect with each other. Then, as shown in FIG. 13, the front caster arm 31 and the rear caster arm 35 are arranged at the accommodation positions on the left and right outer side portions of the seat portion 6 in the seat body 2.

At this time, the rotation amount of the front caster arm 31 and the rear caster arm 35 is set by the length of the lever arm 68 and the like. Therefore, by appropriately changing the length and the like of the lever arm 68, it is possible to freely change the amount of rotation for rotating the front caster arm 31 and the rear caster arm 35.

In addition to this, as shown in FIG. 14, the front caster arm 31 having the front tire 32 and the rear caster arm 35 having the rear tire 36 are connected to each other by a connecting rod 74 having a rotating shaft 73 at a substantially central portion thereof. You may connect. In this case, as shown in FIG. 15, the rotary shaft 73 is guided upward by operating an operating means (not shown), and the front caster arm 31 and the rear caster arm 35 are rotated inwardly intersecting each other. Then, as shown in FIG. 16, the front caster arm 31
The rear caster arm 35 is disposed at the accommodation position on the left and right outer side portions of the seat portion 6 of the seat body 2.

The caster shaft 42 of the front caster 32 shown in FIGS. 8, 11, and 14 is arranged at a position offset to the rear side from the central axis L1 of the front caster arm 31. Similarly, rear caster 3
The caster shaft 50 of No. 6 is arranged at a position offset to the front side from the central axis L2 of the rear caster arm 35. As a result, the amount of rotation of the front caster arm 31 and the rear caster arm 35 when the front caster arm 31 and the rear caster arm 35 are folded and the front caster 32 and the rear caster 36 are arranged at the accommodation position can be set to be small.

[0053]

As described above in detail, according to the present invention as set forth in claim 1, when the front and rear leg members of the seat body are rotated, the wheels of the leg members are left and right of the seat body. There is an excellent effect that the heights of the infant seats can be suppressed by accommodating the seats on both side portions, and the workability of placing or lowering the seat body on the vehicle seat can be improved.

According to the second aspect of the present invention, if the front leg member of the seat body is rotated to the rear side and the rear leg member is rotated to the front side, the wheels of the leg member are The height of the infant seat can be suppressed by accommodating it on both left and right side portions of the seat body. Moreover, since the width direction length of the front leg member is made shorter than the width direction length of the rear leg member, the side supports formed on both sides of the backrest portion and the seat portion of the vehicle seat do not interfere with each other. There is an excellent effect that the vehicle seat can be protected.

According to the third aspect of the present invention, there is an excellent effect that the wheel provided on the leg member can be accommodated by a small amount of rotation of the leg member.

[Brief description of drawings]

FIG. 1 is a perspective view of a baby safety seat according to the present invention in a stroller state.

FIG. 2 is a side view of the infant safety seat in a stroller state.

FIG. 3 is a bottom view of the infant safety seat in a stroller state.

FIG. 4 is a rear view of the infant safety seat in a stroller state.

FIG. 5 is a side view of the child safety seat in a child seat state.

FIG. 6 is a partial cross-sectional view showing a state in which a front caster arm and an auxiliary pipe and a rear caster arm and a connecting pipe are connected and fixed in a base body.

FIG. 7 is a partial perspective view showing a state in which a front caster arm and a connecting pipe are connected and fixed in a base body.

FIG. 8 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 9 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 10 is an explanatory view showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 11 is an explanatory view showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 12 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 13 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 14 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 15 is an explanatory diagram showing another example of the rotating configuration of the front caster arm and the rear caster arm.

FIG. 16 is an explanatory view showing another example of the rotating configuration of the front caster arm and the rear caster arm.

[Explanation of reference numerals] 2 ... Seat body, 31 ... Front caster arm constituting front side leg member, 32 ... Front caster as wheel, 35 ... Rear caster arm constituting rear side leg member, 36 ... Rear caster as wheel , 42 ... Caster shaft as a rotation support shaft, 50 ... Caster shaft as a rotation support shaft

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Fig. 2]

[Figure 5]

[Figure 1]

[Figure 3]

[Figure 4]

[Figure 8]

[Figure 9]

[Figure 6]

[Figure 7]

[Figure 10]

FIG. 11

[Fig. 12]

[Fig. 13]

FIG. 14

FIG. 15

FIG. 16

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Matsumoto 2-chome Toyota-cho, Kariya-shi, Aichi Stock company Toyota Industries Corporation (72) Inventor Kazuhiro Sasaki 2-chome Toyota-cho, Kariya-shi, Aichi Stock Company Toyoda Loom Works (72) Inventor Kazuma Okumura 2-chome Toyota Town, Kariya City, Aichi Stock Company Toyota Loom Works (72) Inventor Kazuo Sato 1 Shimizu, Kitazaki-cho, Obu City, Aichi Prefecture 3 Izumi Industry Co., Ltd. (72) Inventor Masaaki Toya 4-20 Terabe-dori, Minami-ku, Aichi Prefecture Nagoya 1 Lehman Co., Ltd.

Claims (3)

[Claims] 1. A leg structure of a wheel in which leg members that are rotatable on a front side and a rear side of a seat body are provided in a width direction of the seat body, and wheels are provided on the leg members on the front side and the rear side. In the wheel leg structure, the length of the leg member in the width direction is made larger than the length of the seat body in the width direction, and the leg member is rotated to accommodate the wheel on the left and right outer side portions of the seat body. . 2. A leg structure of a wheel, wherein leg members that are rotatable on the front side and the rear side of the seat body are provided in the width direction of the seat body, and wheels are provided on the front and rear leg members. In, the width of the rear leg member in the width direction is larger than the width of the front leg member, and the wheels of the front leg member are rotated to the rear side of the seat body. The wheels of the leg members on the front side are housed in the left and right outer side portions of the seat body, and the wheels of the leg members on the rear side are rotated to the front side of the seat body to move the wheels of the leg members on the rear side to the seat body. The leg structure of the wheel so that it can be accommodated on the left and right outer sides of the. 3. A leg structure for a wheel, wherein leg members that are rotatable on a front side and a rear side of a seat body are provided in a width direction of the seat body, and wheels are provided on the front and rear leg members. In the wheel leg structure, the wheel provided on the leg member has a rotation support shaft of the wheel arranged on the side on which the leg member rotates.