TWI799246B - child safety seat - Google Patents

Abstract

The infant can be easily seated or dismounted in the state attached to the vehicle. A child safety seat (1) configured such that the seat portion (30) can be rotated relative to the base portion (10), and is directed outward from the middle cylindrical portion (33E) of the engaged body (33) under the seat portion (30) The engagement maintaining portion (33F) protrudes, and a plurality of holding protrusions (25) are provided on the base portion (10) so as to partially overlap the circumferential rail (L33F). Therefore, in the child safety seat (1), when the seat portion (30) is rotated about 90 degrees from the forward state or the rearward state with respect to the base portion (10), the engagement maintaining portion (33F) is positioned at two positions. Between the root holding protrusions (25), the seat portion (30) can be maintained in a lateral state.

Description

child safety seat

The present invention relates to a child safety seat, for example, when it is suitable for being mounted on a car and used.

Conventionally, child safety seats have been widely used by being mounted on the seat of the vehicle, for example, when infants are to be seated in vehicles such as automobiles. Also, as a child safety seat, for example, a seat part for infants is proposed that can rotate with respect to a base part mounted on a vehicle, and the angle (that is, inclination) of the seat part relative to the base part can also be adjusted. (For example, refer to Patent Document 1).

In this child safety seat, the seat portion is rotated with respect to the base portion, thereby switching between a forward-facing state in which the infant seated on the seat portion faces the front of the vehicle, and a rear-facing state in which the infant sits on the seat portion faces the rear of the vehicle. . prior art literature patent documents

Patent Document 1: International Publication 2015/025432 (Figures 2 and 3, etc.)

The problem to be solved by the invention

However, when the child safety seat of this structure is mounted on a vehicle, for example, a guardian may seat an infant in the vehicle or dismount the infant from the vehicle. In the case of the child safety seat, when the guardian places the infant on the seat or gets off the seat body, the guardian is located on the front side of the seat in terms of its structure, and the work is facilitated more.

On the other hand, when a guardian is placing an infant in or out of a child safety seat installed in a vehicle, due to the structure of the vehicle, the door of the vehicle is opened, and a person is located in the door opening on the outside of the vehicle. near the child safety seat, that is, on the left or right side of the child safety seat. Then, it is conceivable that, in the child safety seat, the seat portion is rotated with respect to the base so that the front of the seat body faces the guardian side, thereby making it easier for infants to sit on the seat.

However, in terms of safety, etc., the child safety seat has the function of locking the rotation direction only in the above-mentioned forward-facing state and backward-facing state, so it cannot be locked in a state in which the seat portion faces the left and right directions. Therefore, when the child safety seat is installed in the vehicle, it is difficult for the guardian to carry out the task of seating or dismounting the infant.

The present invention has been made in consideration of the above-mentioned points of view, and proposes a child safety seat that makes it easy for infants to sit on or get off in a state of being mounted on a vehicle. technical means to solve problems

The child safety seat of the present invention for solving this problem is provided with: a base portion; a seat body portion that is rotatable about a predetermined central axis with respect to the base portion; a rotation permission prohibition portion that allows the seat body to The rotation of the base part relative to the base part, or the rotation of the seat body part facing a predetermined stable direction is prohibited; the restricted part is provided on the seat body part and rotates around the central axis of the seat body part Displacement along the circumferential orbit; and a restricting portion, which is provided on the base portion, and restricts the displacement of the restricted portion when the seat body portion faces the base portion in a holding direction different from the stabilizing direction by rotation.

In the present invention, when the seat main body is facing the holding direction, the restricted part is restricted by the restricting part, so the rotation of the seat main body with respect to the base part is restricted, and the seat main body can be held in a direction facing the holding direction. direction status. The effect of the invention

According to the present invention, it is possible to realize a child safety seat that can easily seat or dismount an infant while being mounted on a vehicle.

Hereinafter, embodiments (hereinafter referred to as embodiments) will be described using drawings.

[1. Structure of child safety seat] Fig. 1 is a simplified line perspective view showing the whole of a child safety seat 1 according to the present embodiment. FIG. 2 is a simplified line perspective view showing the child safety seat 1 in a forward-facing state. FIG. 3 is a simplified line perspective view showing the state in which the child safety seat 1 is facing backward.

The child safety seat 1 includes a child safety seat body 2 and a support leg 3 detachably attached to the child safety seat body 2 . The child safety seat body 2 includes a base portion 10 mounted on a vehicle seat 100 of a vehicle (for example, an automobile), and a seat portion 30 supported on the base portion 10 . Also, the seat portion 30 of the child safety seat 1 including the seating surface, etc., is covered with a cushioning cover pad 5 as shown in FIG. .

In the description of each component in this specification, in the state where the child safety seat 1 is installed on the vehicle seat 100, the front in the direction of travel of the vehicle is defined as "front", and the opposite side is defined as "rear". . And, the state of the seat portion 30 shown in FIGS. backward state". In addition, the left direction and the right direction seen by the guardian etc. who face the "front" side of the child safety seat 1 are called "left" and "right", respectively.

The seat portion 30 is selectively rotatable with respect to the base portion 10 between a forward state ( FIGS. 1 and 2 ) and a rearward state ( FIG. 3 ) by a rotation mechanism described later. Furthermore, the seat part 30 can change its position and inclination angle in the front-rear direction with respect to the base part 10 by a reclining mechanism described later, that is, it can select any one of a plurality of inclination states to incline.

[2. Structure of base part] Next, the base unit 10 will be described. FIG. 4 is a simplified line perspective view of the base unit 10 , and FIG. 5 is a simplified line plan view of the base unit 10 . The base portion 10 has: a base portion 10A mounted on the seat portion of the vehicle seat 100 ( FIG. 1 ), an upright portion 10B extending upward from the rear of the base portion 10A and facing the back of the vehicle seat 100 , and a The inclined portion 10C between the base portion 10A and the standing portion 10B, and the like.

The base portion 10 is constituted by an upper base portion 11 and a lower base portion 12 . Both the base upper part 11 and the base lower part 12 are formed of a relatively high-strength resin material, and are fitted together to form a base internal space 10S inside the base part 10 .

On the upper surface of the base portion 10A of the base upper portion 11, a base upper support surface 13 is formed. The upper support surface 13 of the base is a part of a curved surface protruding downward, and is formed in a concave shape when viewed from above. And, on the surface of the base upper support surface 13, a plurality of micro-protrusions 13A each formed in a convex curved shape are arranged in a row.

A base hole 14 penetrating in the up-down direction is formed in the central portion of the base upper support surface 13 . The base hole 14 is formed as an elongated hole having a long axis substantially along the front-back direction. Further, on the peripheral edge of the base hole 14 , a support wall 14A is erected downward from the base upper support surface 13 . This support wall 14A has a predetermined length in the vertical direction, and is formed in an annular shape as a whole.

A slope 15 is formed from the upper surface to the front of the inclined portion 10C of the base upper portion 11 . Two guide grooves 16 ( 16A and 16B) penetrating in the vertical direction and extending in the front-rear direction are formed on the slope 15 . In addition, a rectangular opening 18 is formed on the front surface 17 of the standing portion 10B of the base upper portion 11 at the upper center in the left-right direction. A blower fan (not shown) etc. can be attached to this opening part 18, for example.

FIG. 6 is a simplified line perspective view of the lower part 12 of the base. FIG. 7 is a simplified line plan view showing part of the base lower portion 12 . On the lower side of the base hole 14 ( FIGS. 4 and 5 ) of the base lower portion 12 , a base lower support surface 21 is formed. The base lower support surface 21 serving as the base support surface is located above the bottom surface of the base lower portion 12 and has a shape raised from the bottom surface. Also, the base lower support surface 21 is a part of a curved surface protruding downward like the base upper support surface 13 ( FIGS. 4 and 5 ), and forms a concave shape when viewed from above. The base lower support surface 21 is formed to be wider than the base hole projected area AR14 ( FIG. 7 ) projecting the base hole 14 downward.

On the lower support surface 21 of the base, along the imaginary central line CL21 about the left-right direction, circular holes 22 (22A, 22B, and 22C) are perforated at three positions separated in the front-rear direction. The shaft holes 22 serving as the shaft body support portions all have a predetermined depth such that the central axis is perpendicular to the base lower support surface 21 . Further, axial grooves 23 ( 23A and 23B ), which are grooves along the front-rear direction, are formed on the base lower support surface 21 at positions separated by predetermined distances from the center line CL21 to the left and right sides, respectively.

In addition, in the base lower part 12, projecting seat parts 24 (24L and 24R) are respectively formed on the left side and the right side of the base lower support surface 21. As shown in FIG. The upper surface of the protruding pedestal portion 24 has a shape in which the curved surface extended on the left and right outer sides of the base lower support surface 21 is shifted in parallel downward.

Five holding protrusions 25 ( 25L1 to 25L5 and 25R1 to 25R5 ) are vertically provided as regulating portions on the protrusion seat portions 24L and 24R, respectively. Among them, the holding protrusion 25L1 has a protrusion main body portion 25A, a reinforcing portion 25B, and a contact portion 25C, as shown in the enlarged perspective view of FIG. 8 . The protrusion main body portion 25A is formed in a rectangular parallelepiped shape that is shorter in the front-back direction than in the up-down direction as a whole, and shorter in the left-right direction.

The reinforcement part 25B is formed with a leftward bulge on the left side of the protrusion body part 25A, that is, on the side opposite to the central line CL21 ( FIG. 7 ), from the lower end near the center in the front-rear direction of the left side to near the center. . The abutment portion 25C is on the right side of the protrusion body portion 25A, that is, on the same side as the central line CL21 ( FIG. 7 ), and extends from the upper end near the center in the front-back direction of the right side to about 1/3 of the whole. range, forming a bulge in the right direction. In addition, the holding protrusion 25 has a substantially symmetrical shape in the front-rear direction.

In addition, the holding protrusion 25L1 is formed of a resin material as a part of the base lower portion 12 similarly to the protrusion seat portion 24L, the base lower support surface 21 , and the like. Therefore, the holding protrusion 25L1 can be elastically deformed to a certain extent, and when an external force toward the left (that is, a direction away from the center line CL21) acts on the vicinity of the upper end, the vicinity of the upper end will be deflected and deformed to the left. Return to original shape.

Moreover, all of the holding protrusions 25L2 to 25L5 are configured in the same manner as the holding protrusion 25L1. Moreover, all of the holding protrusions 25R1 to 25R5 are configured so as to be bilaterally symmetrical to the holding protrusion 25L1 .

In addition, in the base lower part 12, as shown in FIG. Seat engaging part 28. Furthermore, in the base lower part 12, the engaging operation part 29 for operating the seat engaging part 28 is provided in the vicinity of both left and right ends near the front lower end. In addition, a support leg 3 is attached near the left and right center of the front lower end of the base lower portion 12 .

[3. Structure of seat part and holding part] FIG. 9 is a simplified line perspective view showing the seat part 30 disassembled into its main parts and the structure of the holding part 50. As shown in FIG. The seat portion 30 is roughly divided into a seat body 31 , an upper engaged body 32 , a lower engaged body 33 , an annular cover pad 34 , a center shaft 35 , and a rotation lock shaft 36 . Moreover, the seat part 30 is also provided with: a seat adjustment mechanism part 60 for adjusting the position or direction of the seat part 30 relative to the base part 10, etc., an operation lever part 70 for operating the seat adjustment mechanism part 60, etc. .

[3-1. Structure of the seat portion] The seat body 31 mainly forms a space for infants to sit on, and is integrally formed of, for example, a polypropylene-like hard resin material. The seat body 31 is roughly divided into an upper seat body upper portion 41, a middle seat body middle portion 42, a lower seat body lower portion 43, and a seat body bottom 44 forming a bottom.

The seat body upper portion 41 is formed in a bowl shape or a funnel shape as a whole, and the rear side (hereinafter referred to as a backrest portion 41B) is higher than the front side. A headboard 91 ( FIGS. 2 and 3 ) functioning as a headrest is attached to an upper portion of the backrest portion 41B.

The head plate 91 is an elliptical plate-shaped member with a long axis in the left-right direction and a short axis in the up-and-down direction, and has a shape in which the left side and the right side are each bent forward. Furthermore, the head plate 91 is configured to be able to adjust its position by sliding in the up and down direction with respect to the backrest portion 41B. In addition, the head plate 91 is formed by integrally molding a hard resin material such as polypropylene, for example.

The seat body middle portion 42 is formed in a hollow truncated cone shape whose lower side is smaller than the upper side, centering on the virtual seat central axis X30 along the up-down direction. The middle part 42 of the seat body is one circle smaller than the upper part 41 of the seat body, and its upper end is connected with the upper part 41 of the seat body. The lower part 43 of the seat body is formed into a hollow cylinder centered on the seat central axis X30, and its lower end is closed to form the bottom 44 of the seat body.

FIG. 10 is a simplified line perspective view showing the lower portion of the seat body 31 . The bottom 44 of the seat body is roughly formed in a flat plate shape, and a central axis hole 47 with a circular hole is perforated at the position where the seat central axis X30 passes through. In addition, the bottom 44 of the seat body is provided with a rotation locking shaft hole 48 on the right front side and the right rear side of the central shaft hole 47 . In addition, the seat body bottom 44 is also perforated with screw holes for mounting the engaged body 33 which will be described later.

On the other hand, the central axis body 35 ( FIG. 9 ) is made of a metal material such as steel, is formed in a cylindrical shape along the vertical direction, is sufficiently thick and has sufficient rigidity. The central axis body 35 is inserted through the central axis hole 47 ( FIG. 10 ). And, the rotation lock shaft body 36 ( FIG. 9 ) is made of a metal material such as steel, and has a cylindrical connecting portion 36A along the front-rear direction, and hangs downward from the front end and the rear end of the connecting portion 36A, respectively. A cylindrical locking portion 36B is provided. That is, the rotation lock shaft body 36 has a shape similar to a "ㄇ-shaped nail" used in the field of construction and the like. This rotation lock shaft body 36 is two rotation lock shaft holes 48 ( FIG. 9 ) through which the two lock portions 36B are respectively inserted.

The upper body to be engaged 32 ( FIG. 9 ) constitutes an annular shape, and is installed so as to be located outside the middle part 42 of the seat body 31 . An engaging wall 32A for engaging with an upper engaging claw 52 to be described later is provided on an outer peripheral portion of the upper to-be-engaged body 32 .

The annular cover pad 34 is formed in an annular shape as a whole, and is positioned above the upper to-be-engaged body 32 . The annular cover 34 is not fixed to the seat body 31, but is supported by the annular cover 34 so as to be rotatable around the seat central axis X30. In addition, the annular cover pad 34 is provided with notch portions 34A at two places for avoiding interference with upper engaging claws 52 described later.

FIG. 11 is a simplified line perspective view showing the lower engaged body 33 . FIG. 12 is a simplified line sectional view showing a state in which the lower engaged body 33 is cut in a section along the front-rear direction passing through the seat central axis X30. The lower to-be-engaged body 33 is comprised as a whole in the shape of a disc centering on the seat central axis X30, and is attached to the seat main body bottom 44 of the seat main body 31 (FIG. 9).

The lower engaged body 33 is formed by integrally molding a hard resin material such as polypropylene, for example, and a plurality of plate-shaped members are appropriately bent into a predetermined shape and combined with each other.

Specifically, the lower to-be-engaged body 33 is comprised centering on the disc-shaped central disc part 33A thinner in the up-down direction. A central axis hole 33H1 is perforated in the center of the central circular plate portion 33A, and rotation lock axis holes 33H2 are perforated on the right front side and the right rear side of the central axis hole 33H1, respectively.

On the outer edge of the central disc portion 33A, a cylindrical inner cylindrical portion 33B is erected upward. On the upper end of the inner cylindrical portion 33B, an outer annular portion 33C of an annular shape (that is, a shape in which a long-diameter hole is formed in the central portion of the disc) extends outward. The upper surface of the outer annular portion 33C is an inclined surface whose outer peripheral side is located higher than the inner peripheral side. On the outer edge of the outer annular portion 33C, a cylindrical outer cylindrical portion 33D is erected downward. The lower end of the outer cylindrical portion 33D, which is the engaged portion, is substantially at the same height as the central disc portion 33A.

Further, on the lower surface of the outer annular portion 33C, an intermediate cylindrical portion 33E is erected downward toward the outer side of the middle of the inner cylindrical portion 33B and the outer annular portion 33C. The lower end of the intermediate cylindrical portion 33E is located below the central disc portion 33A. In addition, a reinforcing member of a predetermined shape is suitably provided on the lower side of the central circular plate portion 33A and the outer annular portion 33C and on the inner side of the intermediate cylindrical portion 33E.

In addition, an engagement maintaining portion 33F protruding rearward is provided in the vicinity of the lower end on the rear side of the outer peripheral surface of the outer annular portion 33C. The engagement maintaining portion 33F as a restricted portion is formed in a rectangular parallelepiped shape that is long in the left-right direction, short in the front-rear direction, and short in the up-down direction. In addition, the vicinity of the left end and the vicinity of the right end on the rear side of the engagement maintaining portion 33F are cut off so as to draw a part of an arc when viewed from the upper side or the lower side, that is, they are in a chamfered state.

[3-2. Structure of holding part and engagement with seat part] As for, on the rear lower side of the seat portion 30, a holding portion 50 is arranged ( FIG. 9 ). The holding portion 50 is composed of a holding body portion 51, two upper engaging claws 52, one lower engaging claw 53, and the like.

The holding body portion 51 as a whole is configured in a columnar shape along the left-right direction, and its outer shape when viewed from the left-right direction is a shape close to a parallelogram. The holding body portion 51 is formed of a resin material having sufficient strength. The two upper engaging claws 52 protrude upward from the vicinity of both left and right ends of the holding body 51 . Each upper engaging claw 52 is made of a metal material such as steel, and the upper end side of the cylindrical member along the vertical direction is bent forward into a semicircular shape, that is, when viewed from the right side, it becomes a semicircular shape. A shape in which the uppercase "J" is reversed upside down. The upper engaging claw 52 is sufficiently thick and has sufficient rigidity. Hereinafter, the front end portion of the upper engaging claw 52 is referred to as an upper engaging end portion 52A.

The lower engaging claw 53 as an engaging portion protrudes downward from the vicinity of the center in the left-right direction of the lower surface of the holding body portion 51 . The lower engaging claw 53 is made of a metal material such as steel like the upper engaging claw 52, and the cylindrical member along the vertical direction is bent forward at a plurality of places, and the vicinity of the lower end is bent upward. shape. Hereinafter, the front end portion of the lower engaging claw 53 is referred to as a lower engaging end portion 53A.

FIG. 13 is a simplified line perspective view showing how the upper engaged body 32 and lower engaged body 33 of the seat portion 30 are engaged with the upper engaging claws 52 and lower engaging claws 53 of the holding portion 50 . FIG. 14 is a simplified line perspective view showing how the engaged body 33 under the seat portion 30 is engaged with the engaging claws 53 under the holding portion 50 . The upper engaging claw 52 engages the upper engaging end portion 52A with the engaging wall 32A of the upper to-be-engaged body 32 . And, the lower engaging claw 53 engages the lower engaging end portion 53A with the outer cylindrical portion 33D of the lower engaged body 33 .

The engagement wall 32A of the upper to-be-engaged body 32 is formed in the cylindrical shape centering on the seat center axis X30 as mentioned above. Moreover, the outer cylindrical part 33D of the lower to-be-engaged body 33 is also formed in the cylindrical shape centering on the seat central axis X30. Therefore, when the holding part 50 rotates around the seat center axis X30 as described later, the holding part 50 can also be maintained so that the upper engaging end part 52A engages with the engaging wall 32A and the lower engaging end part 53A is engaged with the outer cylindrical portion 33D.

In addition, the lower engaged body 33 is provided with an engagement maintaining portion 33F on the rear side. Therefore, when the holding portion 50 engages the lower engaging end portion 53A with the outer cylindrical portion 33D on the rear side of the lower engaged body 33, the contact between the lower engaging end portion 53A and the outer cylindrical portion 33D is prevented. The displacement in the downward direction (that is, the release of the engaged state) can maintain the engaged state.

[3-3. Structure of Seat Adjustment Mechanism and Operation Lever] FIG. 15 is a simplified line perspective view showing the interior of the seat body lower portion 43 of the seat portion 30, the seat adjustment mechanism portion 60, and the like. On the top of the seat body bottom 44 in the seat body lower part 43, on the left side of the central axis hole 47 (Fig. 10), a square column-shaped sliding guide 37 along the up-down direction is erected. And, on the upper surface of the bottom 44 of the seat body, on the right side of the central shaft hole 47 and the rotation lock shaft hole 48, a square column-shaped sliding guide 38 along the up-down direction is erected.

A holding member 61 that is slidable in the vertical direction is attached to the slide guide 37 . The holding member 61 has a frame-shaped portion surrounding the slide guide 37, a portion holding the vicinity of the upper end of the central axis body 35 (FIG. 9), and a portion holding other components described later are integrated. And, the holding member 61 is biased downward by the spring 63 .

The central axis body 35 is inserted through the central axis hole 47 ( FIG. 10 ) of the seat body bottom 44 and the central axis hole 33H1 ( FIG. 11 , etc.) of the lower engaged body 33 , and its upper part is held by the holding member 61 . Therefore, the holding member 61 moves up and down along the slide guide 37 , thereby changing the length (that is, the amount of protrusion) of the center shaft 35 protruding downward from the bottom surface of the lower engaged body 33 .

A holding member 62 that is slidable in the vertical direction is attached to the slide guide 38 . The holding member 62 has a structure similar to that of the holding member 61, and includes a frame-shaped portion surrounding the slide guide 38, a portion holding the connection portion 36A of the rotation lock shaft 36 (FIG. 9), and a portion holding other components described later. Parts become one structure. And, the holding member 62 is biased downward by the spring 64 .

The lock portion 36B of the rotation lock shaft body 36 is inserted through the rotation lock shaft hole 48 ( FIG. 10 ) of the seat body bottom 44 and the rotation lock shaft hole 33H2 ( FIG. 11 , etc.) of the lower engaged body 33 , and its upper part is The holding member 62 is for holding. Therefore, by moving the holding member 62 vertically along the slide guide 38, the length (that is, the amount of protrusion) of the rotation lock shaft 36 protruding downward from the bottom surface of the lower engaged body 33 can be changed.

On the other hand, an operation lever portion 70 is provided at the front portion of the inner surface of the seat body upper portion 41 . 16, FIG. 17, and FIG. 18 are simplified line top views, the operation lever part 70 has an operation table 71, a tilt operation lever 73, a rotation operation lever 74, and the like.

The console 71 is formed in a thin plate shape in the vertical direction as a whole, and a stopper portion 71A protruding upward is formed at the front end portion of the upper surface, and a partition portion along the front-rear direction is formed near the left and right center of the upper surface. 71B. In addition, the upper surface of the console 71 is formed as an inclined surface along the inclined direction that connects the front upper side and the rear lower side.

The tilt operation lever 73 is formed as a whole in a rectangular parallelepiped shape that is longer in the front-rear direction and shorter in the up-down direction. 2 or so. In addition, the front half of the upper surface of the tilting operation lever 73 is sufficiently higher than the rear half, so that it is easy to hook a fingertip or the like to the front half.

The tilt operation lever 73 is located on the upper left side of the console 71 , is slidable in the front-rear direction within a range not detached from the console 71 , and is supported by the console 71 . For convenience of description, the position on the rear side (near the seat central axis X30) on the console 71 is referred to as a fixed position, and the position on the front side (a side away from the seat central axis X30) is referred to as a change position.

At the left rear end on the lower side of the tilt operation lever 73, there is provided a lever connection portion 73A protruding downward from the surrounding area. The lever connecting portion 73A is formed in a relatively small cuboid shape, and the tip of the operation lever 65 is connected thereto. The operating rod 65 is, for example, an elongated rod-shaped member made of a metallic material such as steel and has sufficient rigidity not to deform easily, and its rear end is connected to the holding member 61 ( FIG. 15 ).

The rotation operation lever 74 is approximately symmetrical to the tilt operation lever 73 . The rotary operation lever 74 is located on the upper right side of the console 71 , is slidable in the front-rear direction within a range not detached from the console 71 , and is supported by the console 71 . Furthermore, as shown in FIG. 16 , at the right rear end on the lower side of the rotary operation lever 74 , there is provided a lever connecting portion 74A protruding downward from the periphery. The lever connecting portion 74A is formed in a relatively small cuboid shape similarly to the lever connecting portion 73A, and the tip of the operating rod 66 is connected thereto. The operating rod 66, like the operating rod 65, is a slender rod-shaped member made of a metal material such as steel and has sufficient rigidity not easily deformed, and its rear end is connected to the holding member 62 (FIG. 15).

In addition, an operation regulating body 75 is provided on the operation lever portion 70 . As shown in FIG. 16, the operation restricting body 75 is formed as a whole in a rectangular parallelepiped shape that is longer in the left-right direction, shorter in the front-rear direction, and thinner in the up-down direction. Rotate on a plane parallel to the top of the table 71.

On the left side of the operation regulating body 75, a left abutting surface 75L is formed, which is an inclined surface that advances in the right direction as it advances in the rearward direction. The left abutting surface 75L is located on the front side of the rod connecting portion 73A in the normal state. Further, on the right side of the operation regulating body 75, a right abutting surface 75R is formed, which is an inclined surface symmetrical to the left and right sides of the left abutting surface 75L. The right contact surface 75R is located on the front side of the rod connecting portion 74A in the normal state.

With this structure, the seat adjustment mechanism part 60 ( FIG. 15 ), in the non-operated state in which the operation levers are not operated, uses the action of the spring 63 to push the holding member 61 downward and abut against the seat. Body bottom 44 or its vicinity. Thereby, the seat adjustment mechanism part 60 makes the rear end of the operating lever 65 relatively lower and the front end obliquely lower, and the reclining operation lever 73 is positioned at a fixed position on the rear side ( FIG. 16 ).

At this time, the seat adjustment mechanism portion 60, as shown in the simplified line side view of FIG. 20A , is such that the lower part of the central axis body 35 held by the held member 61 protrudes downward from the lower surface of the lower engaged body 33. . Hereinafter this is referred to as the salient state. The central shaft body 35 is inserted into any one of the shaft holes 22A, 22B, or 22C provided in the base lower part 12 (see FIG. 5 etc.) of the base part 10 (details will be described later).

Moreover, the seat adjustment mechanism part 60, under the normal state of not being operated, uses the action of the spring 64 to push the retaining member 62 downward to abut against the bottom 44 of the seat body or its vicinity. Thereby, the seat adjustment mechanism part 60 makes the rear end of the operating rod 66 relatively lower and the front end obliquely lower, and the rotating operation lever 74 is positioned at a fixed position on the rear side of the console 71 ( FIG. 16 ).

At this time, the seat adjustment mechanism part 60, as shown in the simplified line side view of FIG. The lower surface of the lower engaged body 33 protrudes downward. The rotation lock shaft body 36 is inserted into the shaft groove 23A or 23B (details will be described later) provided on the base lower portion 12 ( FIG. 5 etc.) of the base portion 10 .

In the non-operating normal state ( FIG. 16 ), the seat adjustment mechanism part 60 , for example, applies a force in an obliquely forward and upward direction to the tilting operation lever 73 , and the force is transmitted to the holding member 61 through the operating rod 65 , and the holding member 61 A force in the upward direction acts. At this time, the seat adjustment mechanism part 60 slides the holding member 61 along the slide guide 37 while compressing the spring 63 , and pulls up the center axis body 35 integrally with the holding member 61 . Thereby, most or all of the central axis body 35 is housed in the seat body 31 as shown in the simplified line side view of FIG. 19B . Hereinafter referred to as Containment State.

At this time, when the lever portion 70 is operated, as shown in FIG. 17 , the tilt operation lever 73 is moved forward on the console 71 to a changed position, and the lever connecting portion 73A is also moved forward integrally with the tilt operation lever 73 . party moves. Thereby, the operation restricting body 75 receives force from the lever connecting portion 73A, and rotates about 30 degrees counterclockwise in the figure from the normal state shown in FIG. 16 .

As a result, when the restricting body 75 is operated, the left side portion is positioned on the front side of the fixing pin 76 , and the left contact surface 75L is brought into contact with the right side surface of the rod connecting portion 73A. Further, the operation of the restricting body 75 positions the right side portion behind the fixing pin 76 and brings the right contact surface 75R close to or in contact with the front side of the rod connecting portion 74A. Therefore, in the operation lever portion 70 , the forward movement of the lever connection portion 74A is regulated by the operation regulating body 75 , and the rotational operation lever 74 cannot be displaced from the fixed position.

In this state, the seat adjustment mechanism part 60 cannot move downward due to reasons such as the front end of the central shaft body 35 abutting against the base lower support surface 21 of the base lower part 12 (see FIG. 5 , etc.). The state of containment. At this time, the lever portion 70 is operated to keep the tilt operation lever 73 at the changing position, and accordingly, the rotation operation lever 74 is kept at the fixed position.

Afterwards, in the seat adjustment mechanism part 60, when the front end of the central axis body 35 can move downward and can migrate to the protruding state, each part returns to the normal state (Fig. 16), and the tilting operation pull rod 73 returns to the rear side. Fixed position.

On the other hand, in the normal state, the seat adjustment mechanism part 60 applies a force in an obliquely forward upward direction to the rotating operation lever 74, and this force is transmitted to the holding member 62 through the operating rod 66, and acts on the holding member 62. There is a force in the upward direction. At this time, the seat adjustment mechanism portion 60 slides the holding member 62 along the slide guide 38 while compressing the spring 64 , and pulls up the rotation lock shaft 36 integrally with the holding member 62 . Thereby, when the lock shaft 36 is rotated, most or all of the lock portion 36B is accommodated in the seat body 31 as shown in the simplified line side view of FIG. 20B .

At this time, when the lever portion 70 is operated, as shown in FIG. 18 , the rotary operation lever 74 is moved forward on the console 71 to a changed position, and the lever connecting portion 74A is also moved forward integrally with the rotary operation lever 74 . party moves. Thereby, the operation restricting body 75 receives force from the lever connecting portion 74A, and rotates about 30 degrees clockwise in the drawing from the normal state shown in FIG. 16 .

As a result, when the restricting body 75 is operated, the right side portion is located on the front side of the fixing pin 76 , and the right contact surface 75R is brought into contact with the left side surface of the rod connecting portion 74A. Further, the operation of the restricting body 75 positions the left side portion behind the fixing pin 76 and brings the left contact surface 75L close to or in contact with the front side of the rod connecting portion 73A. Therefore, in the operation lever portion 70 , the forward movement of the lever connection portion 73A is regulated by the operation regulating body 75 , and the reclining operation lever 73 cannot be displaced from the fixed position.

In this state, the seat adjustment mechanism part 60 cannot go down because, for example, the front end of the lock part 36B of the rotation lock shaft body 36 abuts against the base lower support surface 21 of the base lower part 12 (FIG. 5, etc.). Moving in the same direction, there are cases where the containment status is maintained. At this time, the lever portion 70 is operated to keep the rotation operation lever 74 at the changed position, and accordingly, the tilt operation lever 73 is kept at the fixed position.

Afterwards, in the seat adjustment mechanism part 60, when the front end of the locking part 36B of the rotating locking shaft body 36 can move downward, and can migrate to the protruding state, each part returns to the normal state (FIG. 16), and the lever 74 is rotated and operated. Return to a stationary position on the rear side.

As described above, in the seat adjustment mechanism portion 60 , the center shaft 35 and the rotation lock shaft 36 are moved vertically in conjunction with the front-rear displacements of the tilt operation lever 73 and the rotation operation lever 74 . And, in the operation lever part 70, under the normal state (FIG. 16) in which the tilt operation lever 73 and the rotation operation lever 74 are all at fixed positions, only one of the operation levers can be displaced to the changed position forward, and the After the operation pull rod returns to the fixed position, the other party's operation pull rod can be operated.

[4. Tilting and rotation of the seat] Next, the inclination and rotation of the seat portion 30 will be described. Fig. 21 is a simplified line sectional view of the child safety seat 1 viewed from the right. 22 is a simplified line sectional view of the child safety seat 1 viewed from the front direction.

When the child safety seat 1 is manufactured, the seat adjustment mechanism part 60 or the operation lever part 70 etc. are assembled to the seat body 31 of the seat part 30, and the annular cover pad 34 is inserted around the middle part 42 of the seat body, To install the upper engaged body 32 . In addition, in the child safety seat 1 , the lower engaged body 33 is attached to the seat in a state where the seat body lower portion 43 of the seat portion 30 is inserted through the base hole 14 formed in the base upper portion 11 of the base portion 10 . The seat body bottom 44 of the main body 31 , and the base lower part 12 is further installed on the base upper part 11 .

Therefore, in the child safety seat 1 , the seat body lower portion 43 can be prevented from being pulled out from the base hole 14 , and the seat body lower portion 43 can be displaced and rotated substantially forward and backward in the base hole 14 . That is, in the child safety seat 1 , the seat part 30 can be displaced and rotated in the front-rear direction with respect to the base part 10 .

Furthermore, the base upper support surface 13 of the base upper part 11 and the base lower support surface 21 of the base lower part 12 are both formed in a downwardly convex curved shape. Therefore, in the child safety seat 1, by displacing the seat portion 30 in the front-rear direction with respect to the base portion 10, the position and inclination angle of the seat portion 30 with respect to the base portion 10 in the front-rear direction are changed, that is, the its tilted.

In addition, in the child safety seat 1, the central axis body 35 of the seat portion 30 is inserted into any one of the axis holes 22A, 22B, or 22C provided in the base portion 10, whereby the inclined position or angle can be stabilized. (fixed) in three places. In addition, in the child safety seat 1 , the guardian or the like operates the reclining operation lever 73 of the operation lever portion 70 as described above, whereby the center axis body 35 can be operated through the seat adjustment mechanism portion 60 . Specifically, in the child safety seat 1 , by operating the tilting operation lever 73 , it is possible to switch between the protruding state in which the lower engaged body 33 protrudes downward and the accommodated state in the seat body 31 .

That is, in the child safety seat 1 , after the reclining operation lever 73 is operated, the seat portion 30 is moved forward and backward, whereby the position or angle of inclination can be adjusted (switched) in three stages.

Furthermore, in the child safety seat 1 , the rotation direction can be stabilized (fixed) by inserting the rotation lock shaft 36 of the seat portion 30 into either the shaft groove 23A or 23B provided in the base portion 10 . In addition, in the child safety seat 1 , as described above, the guardian or the like operates the rotation operation lever 74 of the operation lever portion 70 , whereby the rotation lock shaft 36 can be operated through the seat adjustment mechanism portion 60 . Specifically, in the child safety seat 1 , by operating the rotational operation lever 74 , it is possible to switch between the protruding state in which the lower engaged body 33 protrudes downward and the accommodated state in the seat body 31 .

That is, in the child safety seat 1, after operating the rotation operation lever 74, the seat portion 30 is rotated, whereby as shown in FIGS. 2 and 3 , the orientation of the seat portion 30 can be adjusted (switched) into two stage.

Hereinafter, the inclination and rotation of the seat portion 30 of the child safety seat 1 will be described centering on the states of the operation levers of the operation lever portion 70 or the states of the center shaft 35 and the rotation lock shaft 36 .

[4-1. Inclination of the seat portion] Here, the case where the shaft hole 22 in which the central shaft body 35 is inserted is switched from the shaft hole 22B to the shaft hole 22A is described as an example for adjusting the inclination of the seat portion 30 in the child safety seat 1 .

Figure 23A schematically shows the shaft holes 22 (22A, 22B and 22C) and the shaft grooves 23 (23A and 23B) provided on the lower support surface 21 of the base part 10, and schematically shows the central shaft body 35 and the rotation lock A top view of the shaft body 36 . And, in FIG. 23A , with regard to the center shaft body 35 and the rotation locking shaft body 36 , the state inserted into any shaft hole 22 or shaft groove 23 is indicated by oblique lines, and the state of being inserted into any shaft hole 22 or shaft groove 23 is indicated by white. unplugged state. The same applies to FIG. 24A, FIG. 25A, FIG. 26A, FIG. 27A, FIG. 28A, and FIG. 29A.

FIG. 23B is a cross-sectional view schematically showing the appearance of the A1-A2 cross-section in FIG. 23A viewed from the right side. The same applies to Fig. 24B, Fig. 25B, Fig. 26B, Fig. 27B, Fig. 28B and Fig. 29B. FIG. 23C is a cross-sectional view schematically showing the appearance of the B1-B2 cross-section in FIG. 23A viewed from the right side. The same applies to FIG. 24C, FIG. 25C, FIG. 26C, FIG. 27C, and FIG. 28C. FIG. 29C is a cross-sectional view schematically showing the appearance of the C1-C2 cross-section in FIG. 29A viewed from the right side.

In the initial stage, the child safety seat 1 is in a normal state in which the operation lever portion 70 is not operated, and as shown in FIG. 16 , each operation lever is in a fixed position on the rear side. At this time, on the lower support surface 21 of the base, as shown in FIGS. 23A , 23B and 23C, the central axis body 35 is inserted into the shaft hole 22B in a protruding state, and the rotation lock shaft body 36 is also inserted in a protruding state. to shaft groove 23B.

Next, in the child safety seat 1, as shown in FIG. 17, the tilt operation lever 73 is operated to move to the changed position, while the rotation operation lever 74 remains at the fixed position. At this time, on the lower support surface 21 of the base, as shown in FIGS. 24A , 24B and 24C, the center shaft body 35 is pulled out from the shaft hole 22B to be in a housed state, while the rotation lock shaft body 36 is maintained. The protruding state is continuously inserted into the shaft groove 23B.

Next, in the child safety seat 1 , the seat portion 30 is moved forward with respect to the base portion 10 by a manual operation of a guardian or the like. At this time, the central axis body 35, as shown in Fig. 25A, Fig. 25B and Fig. 25C, its lower end moves while sliding on the lower support surface 21 of the base, so most of it is maintained in the seat body 31. Containment status. And, the rotation lock shaft body 36 continues to maintain the protruding state, so it moves forward in the shaft groove 23B. Therefore, the lever portion 70 is operated to maintain the state shown in FIG. 17 .

Then the child safety seat 1, as shown in Figure 26A, Figure 26B and Figure 26C, when the central shaft body 35 reaches the top of the shaft hole 22A, the central shaft body will be pushed back by the action of the spring 63 (Figure 15). 35 is pushed downwards and inserted into the shaft hole 22A. Accompanying this, the lever 73 is tilted to return from the changed position on the front side to the fixed position on the rear side. And, the rotation lock shaft body 36 continues to be inserted into the shaft groove 23B while maintaining the protruding state. Therefore, the lever portion 70 is operated to return to the normal state shown in FIG. 16 .

[4-2. Rotation of the seat part] Next, with regard to how the seat part 30 is rotated to adjust the direction in the child safety seat 1, a case where the shaft groove 23 in which the rotation lock shaft body 36 is inserted is switched from the shaft groove 23B to the shaft groove 23A, that is, the case will be described. The case where the seat portion 30 is switched from the forward-facing state ( FIGS. 1 and 2 ) to the rearward-facing state ( FIG. 3 ).

In the initial stage, the child safety seat 1 is in a normal state in which the operation lever portion 70 is not operated, and as shown in FIG. 16 , each operation lever is in a fixed position on the rear side. At this time, on the lower support surface 21 of the base, as shown in FIGS. 23A , 23B and 23C, the central axis body 35 is inserted into the shaft hole 22B in a protruding state, and the rotation lock shaft body 36 is also inserted in a protruding state. to shaft groove 23B.

Next, in the child safety seat 1 , as shown in FIG. 18 , the rotational operation lever 74 is operated to move to the changed position, while the reclining operation lever 73 remains at the fixed position. At this time, on the lower support surface 21 of the base, as shown in FIGS. 27A, 27B and 27C, the rotation lock shaft body 36 is pulled out from the shaft groove 23B to be in a housed state, while the central shaft body 35 is maintained. The protruding state is continuously inserted into the shaft hole 22B.

Next, in the child safety seat 1 , the seat portion 30 is rotated with respect to the base portion 10 by a manual operation of a guardian or the like. Here, the seat part 30 rotates clockwise. At this time, the rotation locking shaft body 36, as shown in Figure 28A, Figure 28B and Figure 28C, its lower end moves while sliding on the lower support surface 21 of the base, so most of it is kept in the seat body 31. containment status. And, since the central axis body 35 continues to maintain the protruding state, it is still inserted into the axis hole 22B and becomes the rotation center of the seat portion 30 . Therefore, the lever portion 70 is operated to maintain the state shown in FIG. 18 .

Then, the child safety seat 1, as shown in Fig. 29A, Fig. 29B and Fig. 29C, when the rotation locking shaft body 36 reaches the top of the shaft groove 23A, the rotation is performed by the spring 64 (Fig. 15). The lock shaft 36 is spring-pushed downward and inserted into the shaft groove 23A. Accompanying this, the lever 74 is rotated to return from the changed position on the front side to the fixed position on the rear side. And, the center shaft body 35 continues to be inserted into the shaft hole 22B while maintaining the protruding state. Therefore, the lever portion 70 is operated to return to the normal state shown in FIG. 16 .

As described above, in the child safety seat 1, the center axis body 35, the rotation lock axis body 36, the seat adjustment mechanism portion 60, and the operation lever portion 70 are switched to allow or prohibit the seat portion 30 from operating the child safety seat 1 based on the operation of the guardian or the like. Rotation of the base part 10 . Hereinafter, the center shaft body 35 , the rotation lock shaft body 36 , the seat adjustment mechanism portion 60 , and the operation lever portion 70 are collectively referred to as a rotation permission prohibition portion.

In addition, in the child safety seat 1, in the forward state ( FIGS. 1 and 2 ) in which the seat portion 30 faces in the forward direction or in the rearward state ( FIG. 3 ) in the rearward direction, the rotation lock shaft body 36 is inserted into the shaft. Groove 23, so it becomes a stable state where rotation is prohibited. Therefore, hereinafter, the front direction and the rear direction are referred to as stable directions.

[4-3. Maintenance of rotation direction by holding protrusion] In addition to this structure, in the child safety seat 1 , as shown in FIGS. 6 , 7 and 8 , a plurality of holding protrusions 25 are provided on the base lower portion 12 of the base portion 10 . Here, FIG. 30 is a simplified line perspective view of the base lower part 12 and the lower engaged body 33 in a state where the central shaft body 35 is inserted into the shaft hole 22A, showing a situation in which a part of the base lower part 12 is cut off. . Also, FIG. 31 is a simplified line sectional view showing a state in which the base lower portion 12 and a part of the lower engaged body 33 are cut in a state where the central shaft body 35 is inserted into the shaft hole 22A.

In addition, FIG. 32 is a simplified line plan view showing the positional relationship between each shaft hole 22 and each holding protrusion 25 of the base lower portion 12 , the middle cylindrical portion 33E of the lower engaged body 33 , and the central shaft body 35 . In FIG. 32 , the middle cylindrical portion 33E of the case where the central shaft body 35 is inserted into the shaft hole 22A is shown by a solid line, and a virtual straight line passing through the center of the shaft hole 22A and along the left-right direction is shown as a virtual center line X22A. .

Also, in FIG. 32 , the middle cylindrical portion 33E of the case where the center shaft body 35 is inserted into the shaft hole 22B is shown by a dotted line, and a virtual straight line passing through the center of the shaft hole 22B and along the left-right direction is shown as a virtual center line X22B. . In addition, in FIG. 32 , the middle cylindrical portion 33E of the case where the central shaft body 35 is inserted into the shaft hole 22C is shown by a dotted line, and a virtual straight line passing through the center of the shaft hole 22C and along the left-right direction is shown as a virtual center line X22C. .

In the child safety seat 1, as shown by the solid line in FIG. 32, when the center shaft body 35 is inserted into the shaft hole 22A, the holding protrusions 25L1 and 25L2 are respectively positioned at the virtual center near the left side of the middle cylindrical portion 33E. Front side and rear side of line X22. In addition, in the child safety seat 1 , the holding protrusions 25R1 and 25R2 are respectively located on the front side and the rear side of the imaginary center line X22 in the vicinity of the right side of the middle cylindrical portion 33E.

In addition, in the child safety seat 1, as shown in FIGS. 30 and 31 , the upper end of the holding protrusion 25L1 and the like is located below the lower end of the outer cylindrical portion 33D of the lower engaged body 33, and the holding protrusion 25L1 is avoided. Interference or abutment between etc. and the outer cylindrical portion 33D.

As for the lower to-be-engaged body 33 (FIG. 11 etc.), as mentioned above, the engagement maintaining part 33F protruding rearward is provided in the vicinity of the lower end of the rear side of the intermediate cylindrical part 33E. As shown in FIG. 32 , when the lower engaged body 33 rotates about the center shaft body 35 inserted into the shaft hole 22A, it is formed to be in contact with the middle cylinder by a portion through which the engagement maintaining portion 33F passes. An imaginary ring adjoining the outer side of the portion 33E. Hereinafter, this circular ring is referred to as a circular orbit L33F, and a circle representing the outer circumference of this circular orbit L33F is referred to as an outer peripheral circle C33F. In addition, below, the position of the engagement maintaining part 33F is demonstrated based on the center shaft body 35. As shown in FIG.

Referring to FIG. 32 , holding protrusions 25L1 and 25L2 and 25R1 and 25R2 are partially positioned on the circumferential track L33F. This means that when the lower engaged body 33 rotates, the engagement maintaining portion 33F abuts against the holding protrusions 25L1 and 25L2 and 25R1 and 25R2 , respectively. And this means that when the lower engaged body 33 rotates, the engagement maintaining portion 33F does not come into contact with the holding protrusions 25L3 to 25L5 and 25R3 to 25R5 .

Here, in the state where the central shaft body 35 is inserted into the shaft hole 22A, taking the case where the seat portion 30 is rotated counterclockwise from the forward state (FIG. 1 and FIG. 2) as an example, the engagement maintaining portion 33F and the holding protrusion will be described. 25 The appearance of touching. Fig. 33, Fig. 34 and Fig. 35 are simplified line plan views corresponding to a part of Fig. 32 .

First, in the child safety seat 1 , when the seat portion 30 is in the forward-facing state ( FIGS. 1 and 2 ), as shown in FIG. 32 , the engagement maintaining portion 33F is located on the rear side. In the child safety seat 1, when the seat portion 30 is rotated about 80 degrees counterclockwise from the forward-facing state, as shown in FIG. 8) on the right rear side.

Here, the lower to-be-engaged body 33 has relatively high strength of each portion including the engagement maintaining portion 33F, and is not easily deformed. On the other hand, the holding protrusion 25 is elastically deformable so that the upper portion bends in the left-right direction relative to the lower portion as described above.

In the child safety seat 1, when the seat portion 30 is rotated counterclockwise from the state shown in FIG. 33, as shown in FIG. directional force. Thereby, the holding protrusion 25L2 is deformed so as to displace the upper part in the left direction (that is, the direction away from the center axis body 35 ) due to the left direction component of the force, and is pushed to the circumferential orbit. The outside of the L33F.

From another point of view, the child safety seat 1 resists to some extent in the stage where the lower engaged body 33 abuts against the holding protrusion 25L2 during the rotating operation of the seat portion 30 . At this time, in the child safety seat 1, if the force applied to the seat portion 30 is too small to deform the holding protrusion 25L2 to the extent that it is pushed out of the circumferential rail L33F, the rotation operation cannot be continued and stops. On the other hand, in the child safety seat 1, if the force applied to the seat portion 30 is large enough to deform the holding protrusion 25L2 to the extent that it is pushed out of the circumferential rail L33F, the rotation operation can be continued. That is, in the child safety seat 1 , in order to continue the rotational operation, it is necessary to apply a force large enough to deform the holding protrusion 25L2 to the seat portion 30 .

Then, in the child safety seat 1 , as shown in FIG. 35 , the seat portion 30 is continuously rotated counterclockwise so that the entire engagement maintaining portion 33F reaches below the contact portion 25C of the holding protrusion 25L2 . In this way, in the child safety seat 1 , the force from the engagement maintaining portion 33F on the holding protrusion 25L2 no longer acts, and the holding protrusion 25L2 returns to its original shape.

At this time, in the child safety seat 1, the engagement maintaining portion 33F is sandwiched between the holding protrusion 25L1 and the holding protrusion 25L2, and the seat portion 30 is rotated about 90 degrees counterclockwise from the forward-facing state (see FIG. 2 , etc.) to become A state facing the right direction (hereinafter referred to as a horizontal state). When the seat portion 30 is in this lateral state, the holding protrusions 25L2 and 25L1 abut against or approach the engagement maintaining portion 33F. Therefore, in the child safety seat 1, when the seat portion 30 is rotated in any direction from the state shown in FIG. A force of sufficient magnitude.

That is, the child safety seat 1 can maintain the lateral state until a sufficiently large external force is applied when the seat portion 30 is in the lateral state. And, the child safety seat 1 starts to rotate when a sufficiently large force is applied to the seat portion 30 in this lateral state. Then, the child safety seat 1 becomes the forward facing state (FIG. 1 and FIG. 2) or the backward facing state (FIG. 3), the rotation lock shaft 36 is inserted into the shaft groove 23A or 23B, and the rotation operation is completed.

In addition, in the child safety seat 1, when the seat portion 30 is rotated clockwise by approximately 90 degrees from the backward facing state ( FIG. 3 ) to become a lateral state facing the right direction, the engagement maintaining portion 33F will also be as shown in FIG. 35 . It is sandwiched between the holding protrusion 25L1 and the holding protrusion 25L2. Therefore, the child safety seat 1 can maintain the lateral state until a sufficiently large external force is applied.

In addition, when the child safety seat 1 is rotated about 90 degrees clockwise from the forward-facing state (FIG. 1 and FIG. 2 ) to become the lateral state facing the left direction, the child safety seat 1 is in a state in which the left and right sides of FIG. 35 are reversed. . At this time, the engagement maintaining portion 33F is sandwiched between the holding protrusion 25R1 and the holding protrusion 25R2 . In addition, in the child safety seat 1, when the seat portion 30 is rotated about 90 degrees counterclockwise from the backward facing state ( FIG. 3 ) to become the lateral state facing the left direction, the same state as described above is also achieved. That is, the engagement maintaining portion 33F is sandwiched between the holding protrusion 25R1 and the holding protrusion 25R2 . Therefore, the child safety seat 1 can maintain the lateral state until a sufficiently large external force is applied.

For convenience of description, below, when the engagement maintaining portion 33F is held so as to be sandwiched between the two holding protrusions 25 so that the seat portion 30 is not easily rotated, the direction that the seat portion 30 faces, that is, the left direction or The right direction is called the hold direction.

Next, in the child safety seat 1, as shown by the dotted line in FIG. The front side and the back side of the centerline X22B. In addition, in the child safety seat 1 , the holding protrusions 25R2 and 25R3 are respectively located on the front side and the rear side of the imaginary center line X22B near the right side of the middle cylindrical portion 33E.

In addition, in the child safety seat 1, as shown by the dotted line in FIG. 32, when the center shaft body 35 is inserted into the shaft hole 22C, the holding protrusions 25L4 and 25L5 are respectively positioned at the virtual center near the left side of the middle cylindrical portion 33E. The front side and the back side of line X22C. In addition, in the child safety seat 1 , the holding protrusions 25R4 and 25R5 are respectively located on the front side and the rear side of the imaginary center line X22C near the right side of the middle cylindrical portion 33E.

Therefore, the child safety seat 1 is in the same state as when the center shaft body 35 is inserted into the shaft hole 22B or 22C, as in the case of being inserted into the shaft hole 22A. That is, the child safety seat 1 can maintain the lateral state until a sufficiently large external force is applied when the seat portion 30 is in the lateral state toward the right or left.

As for the child safety seat 1 , as described above, the seat portion 30 is displaced approximately in the front-rear direction with respect to the base portion 10 by inclination, thereby changing its posture. As mentioned above, when the seat portion 30 is displaced, the range through which the intermediate cylindrical portion 33E passes is, as shown in FIG. through range). As can be seen from FIG. 32 , each holding protrusion 25 is located outside the intermediate cylindrical portion passing range AR33E. This means that when the seat portion 30 is displaced in the front-rear direction with respect to the base portion 10 , the intermediate cylindrical portion 33E does not come into contact with the holding protrusion 25 .

[5, effects, etc.] Among the above structures, the child safety seat 1 of the present embodiment is configured so that the seat portion 30 is rotatable with respect to the base portion 10 . Furthermore, in the child safety seat 1 , the engagement maintaining portion 33F protrudes outward from the intermediate cylindrical portion 33E of the body to be engaged 33 under the seat portion 30 , and a plurality of holding protrusions 25 are provided on the base portion 10 .

The child safety seat 1 can rotate the seat part 30 clockwise or counterclockwise with respect to the base part 10 from the forward-facing state or the rear-facing state when the parent or the like operates the lever part 70 . Then, when the child safety seat 1 is rotated about 90 degrees from the forward state or the rearward state, the engagement maintaining portion 33F is located between the two holding protrusions 25, and the seat portion 30 is brought into a horizontal state (FIG. 33 , Figure 34 and Figure 35).

At this time, in the child safety seat 1, when no force is applied to the seat part 30 in the lateral state, or a weak force is applied to either direction of rotation, at least a part of the holding protrusion 25 remains on the circumferential track L33F ( Figure 32 etc.). Therefore, the child safety seat 1 can maintain the horizontal state without rotating the seat portion 30 .

In general, the child safety seat 1 is, as shown in FIG. 1 , a base portion 10 mounted on a vehicle seat 100 ( FIG. 1 ) of an automobile. The guardian opens the door of the car and stands on the right or left side of the child safety seat 1 outside the car when the baby is seated on the seat portion 30 of the child safety seat 1 or when the baby is dismounted. , or the state of the vehicle seat sitting next to the vehicle seat 100 is more. That is, the guardian is more likely to be on the right or left side of the child safety seat 1 .

Then, when the child safety seat 1 rotates the seat portion 30 from the forward-facing state or the rear-facing state to the horizontal state by the guardian's operation, the horizontal state can be maintained. Therefore, the guardian does not need to hold the seat portion 30 in particular, and can easily and safely seat or dismount the baby with both hands while the front side portion of the seat portion 30 faces himself.

In addition, in the child safety seat 1, if a relatively large force acts on the seat portion 30 in the rotation direction in the lateral state, the engagement maintaining portion 33F temporarily deforms the holding protrusion 25, and the seat portion 30 can be deformed temporarily. rotate. Afterwards, the child safety seat 1 can fix the direction of the seat portion 30 by rotating the locking shaft 36 when it is in the forward-facing state ( FIGS. 1 and 2 ) or the rear-facing state ( FIG. 3 ).

That is to say, in the child safety seat 1, when the guardian or the like rotates the seat portion 30, the rotation operation can be stopped at the moment when the guardian or the like feels resistance, so that the seat portion 30 can be held in place without any special operation. Landscape state.

From another point of view, when the child safety seat 1 is in the forward-facing state or the rearward-facing state, when the rotational operation lever 74 of the operation lever portion 70 is operated, the rotational operation lever 74 is located at the change position (front side) ( 18), and make the rotation lock shaft body 36 into a housed state (FIG. 27). Thereafter, when the child safety seat 1 is stationary in the lateral state, the changed position and storage state can be maintained. Then, when the child safety seat 1 is further rotated to the forward-facing state or the rearward-facing state, the rotational operation lever 74 is moved to a fixed position, and the rotational lock shaft body 36 is protruded.

Therefore, in the lateral state, the child safety seat 1 has the rotation operation lever 74 at the changed position for the guardian etc., so that it can be easily recognized that the seat portion 30 is simply held by the base portion 10. , is still relatively easy to rotate. Moreover, the child safety seat 1 can be urged to rotate into a forward state or a rearward state for a guardian or the like so that the seat portion 30 is firmly fixed to the base portion 10 without letting the seat portion 30 is a horizontal state.

Next, in the conventional child safety seat in which the seat portion 30 cannot be stationary in the lateral state, only the rear side of the middle cylindrical portion 33E is located in the lower engaged body 33 ( FIGS. 11 and 12 ) of the seat portion 30 . Near the lower end, an engagement maintaining portion 33F is provided. Thereby, when the seat portion 30 is in the forward-facing state (FIG. 1 and FIG. 2), the lower engaging end portion 53A of the engaging claw 53 under the holding portion 50 (FIG. 9) can be maintained to be engaged with the lower engaged portion. The state of the outer cylindrical part 33D of the body 33. In this structure, the conventional child safety seat is installed on the vehicle seat of the car, and the seat part 30 is placed in a forward state, and the safety of infants is taken into consideration when the car is traveling in the forward direction and a collision or the like occurs. And set. Specifically, in the child safety seat 1, when the seat portion 30 exerts a strong force in the forward direction on the base portion 10 due to the moment of inertia, the engagement between the lower engaging end portion 53A and the outer cylindrical portion 33D , to avoid the situation of detaching from the base portion 10 in advance.

Here, the child safety seat 1 of the present embodiment also utilizes the engagement maintaining portion 33F for the purpose of maintaining the seat portion 30 in the lateral state. Specifically, the child safety seat 1 partially overlaps with the circumferential track L33F ( FIG. 32 ) through which the engagement maintaining portion 33F passes when the seat portion 30 rotates in the base lower portion 12 of the base portion 10 . position, each holding protrusion 25 is provided (FIG. 6 to FIG. 8, FIG. 30 to FIG. 32). On the other hand, in the child safety seat 1 , the structure of the seat portion 30 side including the engagement maintaining portion 33F is not changed from the conventional one, but is maintained as it is. In other words, the child safety seat 1 can maintain the lateral state during the rotation of the seat portion 30 by only changing the structure of part of the base lower portion 12 compared with the conventional structure.

In addition, in the child safety seat 1, for the three shaft holes 22 (22A, 22B, and 22C), holding protrusions 25 ( Figure 32 etc.). Therefore, even when the central shaft body 35 of the seat part 30 is inserted into any shaft hole 22 by inclination, the child safety seat 1 can maintain the lateral state during the rotation of the seat part 30 .

As for the child safety seat 1 , the distance between the shaft holes 22A and 22B is relatively short due to the angle characteristic of the inclination. Therefore, in the child safety seat 1, the positions of the holding protrusions 25 to be arranged on the left and right rear sides of the shaft hole 22A and the positions of the holding protrusions 25 to be arranged on the left and right front sides of the shaft hole 22B will overlap. However, it is difficult to respectively install them at appropriate positions.

Here, the child safety seat 1 is assumed to have the holding protrusions 25L2 and 25R2 disposed on the left rear side and the right rear side of the shaft hole 22A, and on the left front side and the right front side of the shaft hole 22B, and each holding protrusion 25 is located on the The front-back direction is a substantially symmetrical shape (FIG. 6 to FIG. 8 and FIG. 32). In this way, the child safety seat 1 can arrange the holding protrusions 25 at all necessary positions within the limited range of the base portion 10, regardless of which shaft hole 22 the central shaft body 35 is inserted into. The horizontal state can be maintained.

In addition, in the child safety seat 1, when the seat portion 30 is displaced approximately in the front-rear direction by inclination, the holding protrusions 25 are arranged on the outside of the intermediate cylindrical portion passing range AR33E in which the intermediate cylindrical portion 33E is displaced (Fig. 32). Therefore, in the child safety seat 1 , when the seat portion 30 is displaced in the front-rear direction relative to the base portion 10 , contact between the intermediate cylindrical portion 33E and the holding protrusion 25 can be avoided, and the seat portion 30 can be smoothly tilted.

Based on the above structure, the child safety seat 1 of the present embodiment is configured such that the seat portion 30 can be rotated relative to the base portion 10, and the seat portion 30 is engaged from the outer ring portion 33C of the body to be engaged 33 toward the outside. The holding portion 33F protrudes, and a plurality of holding protrusions 25 are provided on the base portion 10 so as to partially overlap the circumferential rail L33F. Therefore, in the child safety seat 1 , when the seat portion 30 is rotated about 90 degrees from the forward-facing state or the rear-facing state with respect to the base portion 10 , the engagement maintaining portion 33F can be positioned between the two holding protrusions 25 . The seat portion 30 is maintained in a horizontal state.

[6. Other implementation forms] In addition, in the above-mentioned embodiment, the case where the upper part of the holding protrusion 25 ( FIG. 8 ) is bendable to the left and right with respect to the lower part, that is, the holding protrusion 25 itself deforms, has been described. However, the present invention is not limited thereto. For example, an elastically deformable connection member may be interposed between the holding protrusion 25 and the protrusion seat portion 24 so that the holding protrusion 25 does not deform itself.

Moreover, in the said embodiment, the case where the several holding protrusion 25 mutually had the same shape was demonstrated (FIG. 6 etc.). However, the present invention is not limited thereto, and for example, the respective holding protrusions 25 may have different shapes from each other.

In addition, in the above-mentioned embodiment, the state where the center shaft body 35 of the seat part 30 is inserted into the shaft hole 22A and the state inserted into the shaft hole 22B are shared, and the holding protrusions 25L2 and 25R2 are shared with the engagement maintaining part 33F. The case of abutment (Figure 32, etc.). However, the present invention is not limited thereto. For example, the state where the center shaft body 35 of the seat portion 30 is inserted into the shaft hole 22A and the state where the center shaft body 35 is inserted into the shaft hole 22B do not share the holding protrusion 25 but are provided separately. The holding protrusion 25 corresponding to these states is also sufficient. In addition, in this case, each holding protrusion 25 may have an asymmetrical shape in the front-rear direction.

In addition, in the above-mentioned embodiment, the case where the central shaft body 35 of the seat part 30 is inserted into any one of the three shaft holes 22 by tilting, and the holding protrusion 25 is provided at each position corresponding to all the shaft holes 22 has been described. (Figure 6 and Figure 32, etc.). However, the present invention is not limited thereto. For example, the holding protrusion 25 may be provided only at a position corresponding to the frontmost shaft hole 22A, or the holding protrusion 25 may be provided only at a part of the shaft hole 22 .

In addition, in the above-mentioned embodiment, the case where a total of two holding protrusions 25 are arranged on the front side and the rear side of the portion where the engagement maintaining portion 33F is located when the seat portion 30 is in the horizontal state has been described. That is, in the child safety seat 1 , the two holding protrusions 25 sandwich the engagement maintaining portion 33F from the front and rear, whereby the seat portion 30 is maintained in the lateral state ( FIG. 35 , etc.). However, the present invention is not limited thereto. For example, in the case where a notch portion recessed toward the central axis hole 33H1 is formed on the outer peripheral side of the engagement maintaining portion 33F, one holding protrusion 25 is provided at a position corresponding to the notch portion. Can. In this case, the holding protrusion 25 is engaged with the notch, whereby the seat portion 30 can be maintained in the lateral state.

In addition, in the above-mentioned embodiment, the case where the holding protrusion 25 is provided in the base lower part 12 located in the lower side in the base part 10 was demonstrated (FIG. 6 etc.). However, the present invention is not limited thereto. For example, holding protrusions 25 may be provided on the inner side of the upper base support surface 13 of the base upper portion 11, and holding protrusions 25 may be provided on other various parts. Alternatively, for example, a single holding protrusion 25 or a combination of a plurality of holding protrusions 25 and the protrusion seat portion 24 may be configured as an independent component, and this component may be attached to the base lower portion 12 or the base upper portion 11 or the like. The holding protrusion 25 may be arranged as long as it is a position where the engagement maintaining portion 33F of the engaged body 33 provided under the seat portion 30 can abut against when rotating.

In addition, in the above-mentioned embodiment, the case where the holding protrusion 25 is provided in the position where the base lower portion 12 of the base portion 10 comes into contact with the engagement maintaining portion 33F when the seat portion 30 rotates has been described. That is, in the child safety seat 1, the rotation of the seat part 30 is restricted by the interference of the holding protrusion 25 and the engagement maintaining part 33F, and the lateral state is maintained (FIG. 32). However, the present invention is not limited thereto. For example, holding protrusions may be provided on the base upper support surface 13 ( FIGS. 4 and 5 ) so as to abut against a predetermined portion protruding outward of the seat body middle portion 42 . That is, in the present invention, the base portion 10 side is a portion that comes into contact with various parts provided on the seat portion 30 when the seat portion 30 is rotated, and the holding protrusion 25 may be provided. In addition, instead of the engagement maintaining portion 33F, a protrusion or the like is separately provided on the seat portion 30 , and the holding protrusion 25 may be provided at a portion abutting on this.

In addition, in the above-mentioned embodiment, when the seat portion 30 is turned into the lateral state by about 90 degrees from the forward state or the rearward state, the engagement maintaining portion 33F is sandwiched by the holding protrusions 25 to maintain the lateral state ( Figure 32). However, the present invention is not limited thereto, and when the seat portion 30 is oriented in various directions, the engagement maintaining portion 33F may be held by the holding protrusions 25 to maintain the direction (state). Specifically, for example, it is conceivable to maintain the seat portion 30 in a state rotated by about 75 degrees or a state rotated by about 60 degrees from the forward-facing state or the rearward-facing state. In this case, when the seat portion 30 is turned half a turn between the forward state and the rearward state, the direction (state) of the seat portion 30 may be maintained at two or more places.

In addition, in the above-mentioned embodiment, it has been described that three shaft holes 22 are provided on the base lower support surface 21 of the base lower part 12 of the base part 10, and the inclination of the seat part 30 can be adjusted in three stages (Fig. 7 etc. ). However, the present invention is not limited thereto. For example, two or more shaft holes 22 are provided on the lower support surface 21 of the base, and the inclination of the seat portion 30 can be adjusted in two or more stages. Or, for example, only one shaft hole 22 is provided on the lower supporting surface 21 of the base, and the tilting function can be omitted.

In addition, this invention is not limited to each said embodiment and other embodiment. That is, the scope of application of the present invention also includes embodiments obtained by arbitrarily combining the above-mentioned embodiments with part or all of the above-mentioned other embodiments, or embodiments obtained by extracting a part.

In addition, in the above-mentioned embodiment, it has been explained that by the base part 10 as the base part, the seat part 30 as the seat part, the center shaft body 35 as the rotation permission prohibition part, the rotation lock shaft body 36, the seat adjustment mechanism part 60 , the operation lever portion 70 , the engagement maintaining portion 33F as the restricted portion, and the holding protrusion 25 as the restricting portion constitute the child safety seat 1 as the child safety seat. However, the present invention is not limited thereto, and the child safety seat may be constituted by a base portion, a seat body portion, a rotation permission prohibition portion, a restricted portion, and a restricting portion having other various structures. Industrial availability

The present invention can be used, for example, in a child safety seat having a mechanism for rotating the seat.

1: Child safety seat 10: base part 11: The upper part of the base 12: The lower part of the base 21: Support surface under the base 22, 22A, 22B, 22C: shaft hole 23,23A,23B: shaft groove 24, 24L, 24R: Protruding base part 25, 25L1, 25L2, 25L3, 25L4, 25L5, 25R1, 25R2, 25R3, 25R4, 25R5: keep the protrusion 30: Seat Department 31: Seat body 32: upper body 33: Bottom body 33D: Outer cylinder part 33E: Middle cylinder part 33F: Engagement maintenance part 35: Central axis body 36: Rotation lock shaft body 50: Holding Department 51: Hold the body part 53: Bottom engaging claw 60: Seat Adjustment Mechanism Department 70: Operation lever part 73: Tilt operation lever 74:Rotate operation lever 100: vehicle seat AR33E: the middle cylinder part through the range C33F: Outer circle L33F: Circumferential orbit X30: Seat center axis

[FIG. 1] FIG. 1 is a simplified line perspective view showing the structure of a child safety seat. [ Fig. 2] Fig. 2 is a simplified line perspective view showing a forward-facing state of the child safety seat. [ Fig. 3] Fig. 3 is a simplified line perspective view showing a rearward-facing state of the child safety seat. [ Fig. 4] Fig. 4 is a simplified line perspective view showing the structure of a base portion. [ Fig. 5] Fig. 5 is a simplified line plan view showing the structure of a base portion. [ Fig. 6] Fig. 6 is a simplified line perspective view showing the structure of the lower part of the base. [ Fig. 7] Fig. 7 is a simplified line plan view showing the structure of the lower part of the base. [ Fig. 8] Fig. 8 is a simplified line perspective view showing the structure of the holding protrusion. [ Fig. 9] Fig. 9 is a simplified line perspective view showing the structure of a seat portion and a holding portion. [Fig. 10] Fig. 10 is a simplified line perspective view showing the structure of the bottom of the seat body. [ Fig. 11] Fig. 11 is a simplified line perspective view showing the structure of the lower to-be-engaged body. [ Fig. 12] Fig. 12 is a simplified line sectional view showing the structure of the lower engaged body. [ Fig. 13] Fig. 13 is a simplified line perspective view showing how the holding part is engaged with the upper and lower engaged bodies. [FIG. 14] FIG. 14 is a simplified line perspective view showing how the holding part engages with the lower to-be-engaged body. [ Fig. 15 ] Fig. 15 is a simplified line perspective view showing the structures of the seat adjustment mechanism part and the tie rod operation part. [FIG. 16] FIG. 16 is a simplified line diagram showing the structure of the lever operation part. [ Fig. 17] Fig. 17 is a simplified diagram showing how the tilt operation lever is shifted to a changed position. [ Fig. 18 ] Fig. 18 is a simplified diagram showing how the rotation operation lever is shifted to a changed position. [FIG. 19] FIGS. 19A and 19B are simplified line diagrams showing the protruded state and the accommodated state of the central axis body. [ Fig. 20] Figs. 20A and 20B are simplified diagrams showing the protruded state and the housed state of the rotation lock shaft body. [ Fig. 21] Fig. 21 is a simplified line sectional view showing a combination of a base portion and a seat portion. [ Fig. 22] Fig. 22 is a simplified line sectional view showing a combination of a base portion and a seat portion. [FIG. 23] FIGS. 23A to 23C are simplified diagrams showing the appearance of each axis body in a normal state. [FIG. 24] FIGS. 24A to 24C are simplified diagrams showing the state of each axis when the tilting operation starts. [FIG. 25] FIGS. 25A to 25C are simplified diagrams showing the appearance of each shaft body during the tilting operation. [ Fig. 26 ] Figs. 26A to 26C are simplified diagrams showing the state of each axis body after the tilting operation is completed. [ Fig. 27] Figs. 27A to 27C are simplified diagrams showing the state of each shaft when the rotation operation starts. [FIG. 28] FIGS. 28A to 28C are simplified diagrams showing the appearance of each shaft body during the rotation operation. [FIG. 29] FIGS. 29A to 29C are simplified diagrams showing the state of each shaft body after the rotation operation is completed. [ Fig. 30] Fig. 30 is a simplified line perspective view showing the relationship between the lower to-be-engaged body and each holding protrusion. [ Fig. 31] Fig. 31 is a simplified line sectional view showing the relationship between the lower to-be-engaged body and each holding protrusion. [ Fig. 32] Fig. 32 is a simplified line diagram showing the positional relationship between the intermediate cylindrical portion, the circumferential track of the engagement maintaining portion, and each holding protrusion. [ Fig. 33] Fig. 33 is a simplified diagram showing the relationship between the engagement maintaining portion and the holding protrusion when the seat portion is rotated. [ Fig. 34] Fig. 34 is a simplified diagram showing the relationship between the engagement maintaining portion and the holding protrusion when the seat portion is rotated. [ Fig. 35 ] Fig. 35 is a simplified diagram showing the relationship between the engagement maintaining portion and the holding protrusion when the seat portion is rotated.

22B, 22C: shaft hole 25L1, 25L2, 25L3, 25L4, 25L5, 25R1, 25R2, 25R3, 25R4, 25R5: keep the protrusion 33E: Middle cylinder part 33F: Engagement maintenance part 35: Central axis body AR33E: the middle cylinder part through the range C33F: Outer circle L33F: Circumferential orbit X22A, X22B, X22C: virtual center line

Claims (8)

A child safety seat, characterized by comprising: a base portion; a seat portion rotatable about a predetermined central axis with respect to the base portion; The aforementioned rotation of the aforementioned seat portion, or prohibiting the aforementioned rotation when the aforementioned seat portion faces a predetermined stable direction; the cylindrical portion, which is provided on the aforementioned seat portion, centered on the aforementioned central axis; the restricted portion, which is provided on the aforementioned seat portion a part protruding to the outside of the cylindrical part and displacing along a circumferential orbit when the seat part rotates around the central axis; When the base part is rotated toward a holding direction different from the stable direction, the displacement of the part to be restricted is restricted, and the restricting part makes a part on the circumferential track, and when the part is moved toward the direction by an external force In the state of the external displacement of the circular orbit, when the external force is released, the part is positioned on the circular orbit. The child safety seat according to Claim 1, further comprising: a holding portion having an engaging portion for holding the position of the seat portion relative to the base portion; and an engaged portion provided on the seat portion , engage with the aforementioned engaging portion of the aforementioned holding portion, The restricted portion maintains a state in which the engaging portion of the holding portion is engaged with the engaged portion when the seat portion is in a posture facing the stable direction with respect to the base portion. The child safety seat according to Claim 1, wherein the restricting portion is arranged at a position abutting against or close to the restricted portion when the seat portion faces the holding direction. The child safety seat according to claim 1, wherein the restricting portion is disposed adjacent to the restricted portion on the circumferential track when the seat portion faces the holding direction. A child safety seat, characterized by comprising: a base portion; a seat portion having a central shaft body along a predetermined central axis, the base portion is rotatable around the central axis; rotation is permitted and prohibited part, which allows the aforementioned rotation of the aforementioned seat part with respect to the aforementioned base part, or prohibits the aforementioned rotation when the aforementioned seat part faces a predetermined stable direction; When the central axis is rotated as the center, it is displaced along a circular orbit; and a restricting portion is provided on the base portion, and the seat portion faces a holding direction different from the stabilizing direction with respect to the base portion by the rotation. In the case of restricting the displacement of the restricted part, the rotation permission and prohibition part has a base support surface that is curved and supports the seat part, and on the base support surface a plurality of The shaft support portion of the spindle body and the aforementioned restricting portion are respectively provided at a plurality of positions corresponding to the plurality of shaft support portions. The child safety seat according to Claim 5, wherein the seat portion further includes a cylindrical portion centered on the central axis, the restricted portion is a portion protruding outward from the cylindrical portion, and the restricted A portion is positioned on the aforementioned circumferential track, and in a state where the portion is displaced to the outside of the circumferential track by an external force, and the external force is released, the portion is positioned on the circumferential track, and the aforementioned restricting portion is respectively provided It is a position corresponding to each of the plurality of shaft support portions, and a position where the central shaft does not come into contact with the cylindrical portion regardless of which shaft support portion supports the central shaft. The child safety seat according to claim 6, wherein the restriction parts are respectively provided in a state where the central shaft body is supported by one of the shaft body support parts to the state of being supported by the other shaft body support parts When supporting the state of the aforementioned central axis body, the cylinder through which the aforementioned cylindrical portion passes is out of the range. The child safety seat according to claim 5, wherein the rotation permission prohibiting portion allows the angle of the seat portion relative to the base portion to be changed when the seat portion is in a posture facing the stable direction relative to the base portion. , when the seat portion is in a posture facing a direction other than the stable direction, changing the angle of the seat portion is prohibited.

Images