JPH07164939A - Child seat - Google Patents

Abstract

PURPOSE:To simplify structure of a lock mechanism to lock a reclining type child seat at the time of reclining it and to reduce cost of the reclining type child seat. CONSTITUTION:A child seat 1 is constituted of a base member 5 placed on a seat for an adult and a seat main body 4 provided on it free to move to recline. A lock mechanism 12 is provided between a seat part lower side of the seat main body 4 and the base member 5. This lock mechanism 12 is furnished with brackets 21, 22 having oblong holes 21a, 22a in which a shaft 10 on the side of the seat part 4a is inserted free to slide and erected on the base member 5. Additionally, stopper tools 40, 41 having a plural number of engagement grooves to engage the shaft 10 are provided on the brackets 21, 22 free to revolve in the state free to switch the engagement grooves to a position facing the oblong holes 21a, 22a and a retreating position by external operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a child seat which is assembled and held on an adult vehicle seat by an adult seat belt and is suitable for seating and protecting an infant or the like, and more particularly to a child seat capable of reclining. Reclining car seats.

[0002]

2. Description of the Related Art As a child seat of this type, for example, JP-B-57-2197 and JP-B-60-270.
Various structures have been proposed in the past, including Japanese Patent No. 65. That is, this type of child seat generally includes a resin seat body formed in a substantially bucket shape including a stool portion and a backrest portion. Further, this seat body is provided with a belt insertion hole formed at the rear of both side portions of the stool and below the back side of the backrest.
By inserting an adult seat belt through these belt insertion holes and hooking it, it is possible to place it forward or backward on an adult vehicle seat (hereinafter referred to as an adult seat) and hold it. Was configured into.

By the way, in recent years, there has been a demand for a child seat of this type having a structure in which the entire seat body can be swung on an adult seat so as to be in a so-called reclining state. Therefore, in addition to the seat body described above, a base member that swingably supports the seat body is used, and the base member is placed on the adult seat side. Various proposals have been made, starting with Japanese Patent No. 23380.

According to such a reclining type child seat, the infant can be seated in the upward state by setting the seat body in the reclining state. Then, the stable sitting state of the infant can be ensured, and the driver can appropriately and surely grasp the sitting state of the infant.

[0005]

However, the conventional child seat which is capable of reclining as described above has the following problems.

That is, such a child seat 1 is
As shown in FIG. 8, for example, it is held on the seat cushion 3 of the adult seat 2 in a forward facing state or the like. Then, in this state, when the seat body 4 reclines on the base member 5, the backrest portion 4b of the seat body 4 is a seat in the adult seat 2 as is clear from the hatched portion in the drawing. It hits the seating surface portion of the back 6 and interferes with it, so that the required reclining operation cannot be performed.

Incidentally, reference numeral 4a in FIG. 8 is a seating portion which constitutes the seat body 4 of the child seat 1, and the detailed structure of the base member 5 and the seat body 4 in the child seat 1 will not be described here.

When the above-mentioned interference problem occurs, conventionally, the child seat 1 can be once removed by removing the adult seat belt (not shown) on the adult seat 2 and then on the seat cushion 3. It was necessary to perform a troublesome and complicated operation of moving the seat back and forth in the front-rear direction and attaching and holding the seat belt for adults again at a position where the reclining operation is possible.

By the way, according to the above-mentioned conventional reclining type child seat 1, for example, there is a problem in supporting the seat body 4 on the base member 5 so as to be able to perform the reclining operation. A problem has arisen from a practical point of view in a lock mechanism for locking in an arbitrary state such as a reclining posture when the shaft is supported or a raised posture.

That is, in the conventional reclining type child seat 1, an adjusting metal fitting having a plurality of locking grooves as a lock adjusting member is pivotally supported on the seat body side, and the adjusting metal fitting is locked by a spring. In general, the structure is such that the base member is provided with a lock rod that is urged to engage with any of the locking grooves.

In such a structure, since the adjusting metal fitting for locking the seat body side by the engagement of the lock rod is made of a metal plate material and has a certain weight, the vehicle seat is used when the child seat is used. When a shock is applied to, its moment of inertia acts strongly,
When this adjusting force causes the adjustment fitting to rotate against the biasing force of the spring, the locked state is released.

In addition, depending on the situation at the time of this impact, the so-called lock-off state, in which the lock rod is disengaged from the engaging groove of the adjusting fitting and is locked at a position where it is difficult to lock again, is likely to occur. Consideration must be given to such points.

In order to solve such a problem, it is sufficient to increase the spring force. However, if this is done, the operation force at the time of the lock adjustment operation becomes heavy, and there is a problem in terms of operability. Must also be considered. Further, it is desirable to consider the arrangement position of the operating member for locking and unlocking in terms of operability and the like.

In particular, in this type of child seat, the seat body 4 can be reliably supported by the base member 5 in a required state, and the reclining operation can be stably and reliably performed, and a reliable locked state can be obtained. It is necessary to be able to easily perform the unlocking operation, and some measures must be taken to satisfy such a point.

The present invention has been made in view of the above circumstances, and in a reclining child seat, the seat body can be locked on the base member in a desired posture state, and even if a shock or the like is received. An object of the present invention is to obtain a reclining type child seat which is not only capable of properly and reliably maintaining a locked state but also has a locking mechanism excellent in operability.

[0016]

In order to meet such demands, a child seat according to the present invention has a base member which is mounted and held on a seat cushion of an adult seat, and a reclining operation on the base member. A seat body that is movably arranged and includes a seat portion and a backrest portion, and the backrest portion of the seat body is rotatably supported with respect to a base member, and a seat is provided below the seat portion of the seat body. A shaft is provided so as to extend in the left-right direction, and the base member is provided with a lock mechanism that slidably supports the shaft in the seat longitudinal direction and locks and fixes the shaft at a predetermined position. And, this lock mechanism has a long hole into which a shaft provided on the lower side of the seating portion of the seat body is slidably inserted in the seat front-rear direction, and a bracket that is erected on the base member side, The stopper tooth is provided so as to be rotatable with respect to the stopper tooth. The stopper tooth has a plurality of locking grooves for locking the shaft at a predetermined position in the long hole on the bracket side and having a long length. It is configured to be switched and rotated by an external operation between a position where the locking groove faces the hole and a retracted position.

[0017]

According to the present invention, the seat body of the child seat is supported on the base member installed on the adult seat side so as to be capable of reclining by the lock mechanism, and the seat body is locked by the lock mechanism on the base member. By this, it is possible to lock and fix it in a desired posture position.

Further, by rotating the stopper tooth by an external operation to release the locked state by the lock mechanism, the seating portion of the seat body is slid forward along the elongated hole in the bracket of the base member. Also, the required reclining operation can be obtained for the backrest part, and the stopper tooth can be returned to the original position at a predetermined position, and the shaft on the seat body side can be locked by the locking groove to maintain the required lock state. Is.

[0019]

1 to 7 show an embodiment of a child seat according to the present invention. In these figures, the same or corresponding parts as those in FIG. 8 described above are designated by the same reference numerals and detailed description thereof is omitted. To do.

That is, a child seat, which is generally designated by reference numeral 1, is a resin-made seat body 4 having a substantially bucket shape consisting of a seat 4a and a backrest 4b, and a base for supporting the seat body 4 in a reclining operation state. And a member 5.

As shown in FIG. 2, the seat body 4 is constructed by covering a surface of a seat body portion, which is resin-molded in a substantially bucket shape, with a foaming polystyrene material or a skin material (not shown). However, detailed description and illustration thereof are omitted.

Although not shown in detail in the seat body 4, an emergency lock type retractor is arranged on the bottom side, and a retractor belt pulled out from the seat body 4 is inserted through the insertion hole of the backrest 4b to the front side. Left and right shoulder belts are provided as safety belts for restraining an infant that are pulled out to the side, and these shoulder belts are joined in a substantially Y shape, and a chest pad for protecting the infant is attached. Furthermore,
It is also well known that a tongue is provided at the lower end of the chest pad and the tongue is detachably inserted into a buckle provided on the front surface side of the stool 4a.

As is apparent from FIG. 1 and the like, in such a child seat 1, the base member 5 is placed on the seat cushion 3 of the adult seat 2 in a forward facing state,
Further, the seat body 4 is hooked and held by an adult seat belt (not shown) to be mounted.

Then, the child seat 1 according to the present invention.
According to FIG. 1, as is clear from FIGS. 1 to 3, the shaft 10 provided in the seating portion 4 a that constitutes the seat body 4 is provided on the base member 5 that is placed on the seat cushion 3 of the adult seat 2. Is supported so as to be slidable in the front-rear direction of the child seat 1, and the back side of the backrest portion 4b is configured to obliquely move forward and backward via the link mechanism 11.

The seat body 4 may be supported on the base member 5 so as to perform a reclining operation.
The link mechanism 11 can be omitted.

Further, the support portion of the seat 4a of the seat body 4 with respect to the base member 5 is provided with a lock mechanism 12 which can be locked and fixed at a predetermined position via the shaft 10 and can maintain that state. There is.

This will be described in detail with reference to FIGS. 1 to 3.
The base member 5 has a base frame 20 having a substantially square shape as a whole. In this base frame 20, a pair of brackets 21 and 22 are fixed to the left and right pipe parts by welding or the like, and pipe frames 23 and 24 that stand up in a substantially L-shape are fixed to the rear pipe part by welding or the like. Has been done.

As is apparent from FIG. 3, each of the brackets 21 and 22 has a long hole 21a extending in the seat front-rear direction.
22a, round holes 21b and 22b, and an inverted L-shaped groove 21
c and 22c are formed. Further, the screw holes 21d, 2
2d and spring stop hooks 21e, 22e are also provided.

Further, the upper ends of the pipe frames 23, 24 are formed as flat parts by pressing, and round holes 23a, 24a are formed. Then, in these round holes 23a, 24a, round holes 26a, 27 provided at the lower ends of link arms 26, 27 provided at both ends of the link shaft 25 constituting the link mechanism 11 by welding or the like.
The a is rotatably supported by being caulked with the rivets 28 and 29. These rivets 28,
A shaft support portion 29 serves as a first rotation center J of the link mechanism 11.

On the other hand, screw holes 25a and 25b are formed at both ends of the link shaft 25. Then, as is apparent from FIG. 2, the link shaft 25 is fitted in a state of straddling between both side walls of the back portion of the backrest portion 4b of the seat body 4, and the lateral holes 30a, 3 formed in each side wall.
Special bolts 30 and 31 are screwed and fixed via 1a.

Therefore, the seat body 4 is pivotally supported on the link shaft 25 by these special bolts 30 and 31. These special bolts 30,
The shaft support portion 31 serves as the second rotation center G of the link mechanism 11.

2 and 3, reference numeral 32 is an adjust lever, and a pair of left and right arm portions 33 and 34 are fixed to the lever portion 32a by welding or the like. Round holes are formed at the ends of the arm portions 33 and 34, and special pins 33a and 34a are respectively provided in the round holes.
It is provided by being inserted from the outside. The rollers 35 and 36 are rotatably fitted to the special pins 33a and 34a, and are fixed by the nuts 33b and 34b.

Numerals 40 and 41 are stopper teeth, and round holes 40a and 41a are formed at the ends thereof.
a and 41a are round holes 21 of the brackets 21 and 22.
It is rotatably supported by pins 42 and 43 with respect to b and 22b.

Therefore, the stopper teeth 40 and 41 are pivotally supported by the pins 42 and 43 so as to be swingable on the brackets 21 and 22 side. Further, locking grooves 40b, 40c, 40d; 41b, 41c, 41d are formed at predetermined intervals on the upper edges of these stopper teeth 40, 41.

The adjusting lever 32 is inserted into the inverted L-shaped groove portions 21c and 22c on the side of the brackets 21 and 22 from the direction of arrow P in FIG. 3, and the fixing brackets 44 and 44 are round holes 44a, 44a; 44a from the outside. , 44a, and by fixing with screws 45, the groove portions 21c, 22c
It can be assembled and held without coming off, and can be rotated freely.

As shown in FIG. 2 and the like, springs 37, 37 are provided in the groove portions 33c, 34c at the tips of the special pins 33a, 34a fixed to the adjusting lever 32.
One end of the bracket is hooked, and the other ends are brackets 21 and 2.
It is hooked on the groove portions of the splint stop hooks 21e and 22e on the second side. Incidentally, reference numerals 32b and 32b in the figure denote lock and unlock operation lever portions formed by bending the adjust lever 32 at both ends thereof in an L shape.

In the above-described structure, the seat body 4 of the child seat 1 is fixed to the base member 5 by first mounting the shaft 10 on one side of the seat body 4 under the seat portion 4a. 10a and bracket 2
1 through the arbitrary locking grooves 40b, 40c, 40d of the stopper tooth 40 from an arbitrary position of the elongated hole 21a, and then the optional locking grooves 41b, 41c, 41c, 41c of the other stopper tooth 41.
41d, the long hole 22a of the bracket 22 and another round hole 10a on the seat body 4 side, and then the screws 10b and 10b are screwed into the threaded portions of the shaft 10 to be fixed. Has become.

On the other hand, in FIGS. 1, 4A, 4B, 5 and the like, the arm portion 33 of the adjusting lever 32,
The roller 35 fitted to the special pin 33a provided at the end of 34 (hereinafter, only one side of the arm 33 will be described)
The spring 37 tries to rotate clockwise in the drawing.

At this time, the arcuate engagement surface 50a of the engagement groove 50 formed in the lower edge of the stopper tooth 40 is brought into surface contact with the upper portion of the roller 37, whereby the stopper tooth 40 is fixed on the fixed side bracket. It rotates in the same direction in the figure, that is, in the clockwise direction around the pin 42, which is a shaft supporting portion of the tooth 21, and pushes up the tooth 40 upward.

When the operating lever portion 32b of the adjusting lever 32 is rotated counterclockwise, which is opposite to the clockwise direction described above, the roller 37 also rotates in the same direction, and the contact point of the roller 37 engages with the engaging groove. When the edge 50b of the shaft 50 is passed, the stopper tooth 40 is released from the shaft support pin 4
It gradually rotates counterclockwise around 2 and tries to rotate downward.

When the rotation of the roller 37 is further advanced, the roller 37 comes into contact with a part of the first inclined surface 50c in the engaging groove 50 of the stopper tooth 40, and the first inclined surface 5
While rolling on 0c, the point S shown in FIG. 4B is reached in accordance with the downward movement. At that time, the stopper tooth 40 is rotated downward to the position shown by the imaginary line in FIG.

On the contrary, when the adjusting lever 32 is rotated by the lever portion 32b in the clockwise direction, the roller 37 moves from the point T in the engaging groove 50 to the second inclined surface 50d. It moves and reaches the edge portion 50b. At that time, the stopper tooth 40 is pushed upward from the imaginary line state in FIG. 4A to the position state shown by the solid line.

When the roller 37 further rotates, it reaches the arcuate engagement surface 50a from the edge portion 50b, and at this time, the posture is almost horizontal, and the stopper tooth 40 stops rising and maintains a constant inclined posture state. It does not fall down.

1 and 5, the operation lever portion 32
When b is rotated counterclockwise, the stopper tooth 40
Is pushed down around the pivot pin 42. Therefore, the shaft 10 which is laterally laid on the lower portion of the seat body 4 is placed in a free state in the long holes 21a and 22a formed in the brackets 21 and 22, and the long hole 21
It is in a state of being freely slidable along a and 22a.

Here, in FIG. 1, the solid line shows the state in which the child seat 1 is up, and the imaginary line shows the state in which the child seat 1 is reclining. That is, in the state where the child seat 1 is awake, the shaft 10 is moved to F
It is at a position indicated by a point (a position where it engages with the locking groove 40d of the stopper tooth 40 in the elongated hole 21a), and at this position, the locking fixed state is established between the locking groove 40d of the stopper tooth 40 and the elongated hole 21a. As a result, the child seat 1 is maintained in the upright state as shown by the solid line in FIG. 1 and FIG.

On the other hand, in the reclining state, when the stopper tooth 40 is pushed downward, the shaft 10 is slid forward together with the seat body 4 to the point D side in FIG. 5, and the stopper tooth 40 is returned upward. , The shaft 10 is locked and fixed by the stopper tooth 40c, so that the child seat 1 is
As shown in the imaginary line in FIG. 1 and in FIG. 7, the reclining state can be maintained.

At this time, the link 25 in the link mechanism 11 for rotatably supporting the seat body 4 of the child seat 1 on the backrest portion 4b side has the point J as the center of rotation, and the point G is indicated by M in FIG. Seat body 4 while moving along the path
Will be pushed forward and moved.

As a result, in the seat body 4 of the child seat 1, the upper rear portion does not interfere with the seating surface of the seat back 6 of the adult seat 2 shown by N in FIG.
From the awake state to the reclining state or vice versa, the desired state can be performed.

Here, the above-mentioned reclining operation is
In the case of stopping in a plurality of steps at an intermediate point from point F to point D, for example, as shown in this embodiment, locking grooves 40c and the like may be provided at a plurality of positions so that they can be locked and fixed at respective positions.

In the above description, only the stopper tooth 40 on one side and its related components have been described, but it goes without saying that the stopper tooth 41 on the opposite side will be in the same operating state.

According to the above construction, the seat body 4 of the child seat 1 is mounted on the base member 5 installed on the adult seat 2 side, the link mechanism 11 and the lock mechanism 12 are provided.
The seat body 4 can be supported so as to be capable of reclining operation with the lock mechanism 12 on the base member 5.
It can be locked and fixed at a required posture position by the lock.

Further, the stopper teeth 40, 41 are rotated by an external operation to the operating lever portions 32b, 32b, and the locked state of the lock mechanism 12 is released, whereby the seat 4a of the seat body 4 is moved to the base. Bracket 2 of member 5
A required reclining operation is obtained by sliding the child seat 1 forward along the long holes 21a and 22a of the wheels 1 and 22 and moving the backrest portion 4b forward of the child seat 1 by the link mechanism 11.

Further, the lever portions 32b, 32b are provided at predetermined positions.
The stopper teeth 40, 41 are returned to their original positions by
0b, 40c, 40d; 41b, 41c, 41d appropriately lock the shaft 10 in the long holes 21a, 22a on the seat body 4 side to easily and reliably maintain the required locked state. The entire structure is simple, and there are advantages such as ease of assembly and cost.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the child seat 1 can be freely modified or changed as necessary, and various modifications can be considered. . For example, in order to perform the reclining operation of the child seat 1, the backrest portion 4 of the seat body 4 is
As the link mechanism 11 that supports b on the side of the base member 5, an appropriate modification may be considered.

[0055]

As described above, according to the child seat according to the present invention, the base member placed on the seat cushion of the adult seat, the reclining operation portion provided on the base member and the stool portion and the backrest. The seat back body of the seat body is rotatably supported with respect to the base member, and the shaft is laid across the seat laterally below the seating portion of the seat body. Is provided with a lock mechanism that slidably supports the shaft in the seat front-rear direction and locks and locks the shaft at a predetermined position. A bracket that has a long hole that can be freely inserted and is erected on the base member side, and a stopper that is rotatably provided with respect to the bracket This stopper tooth has a plurality of locking grooves for locking the shaft at a predetermined position in the long hole on the bracket side, and a position where the locking groove faces the long hole. Since it is configured to be switched and rotated to the retracted position by an external operation, it has various excellent effects as described below, despite the simple configuration.

That is, according to the present invention, the seat body of the child seat is supported by the lock mechanism so that the seat body can be reclined on the base member installed on the adult seat side, and the seat body is supported by the lock mechanism on the base member. The lock allows the lock to be fixed at a desired posture position.

Further, by rotating the stopper tooth by an external operation to release the locked state of the lock mechanism, the seating portion of the seat body is slid forward along the elongated hole in the bracket of the base member, A desired reclining operation can be obtained, and further, the stopper tooth is returned to the original position at a predetermined position, and the shaft on the seat body side is locked by the locking groove, whereby the required locked state can be maintained easily and reliably.

In addition, the lock mechanism having the above-mentioned structure can prevent the occurrence of a lock-off state when a shock is applied as in the prior art, and has a small number of constituent parts, which is excellent in assemblability and cost. The reclining operation can be performed, and the operation thereof is easy.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a child seat according to the present invention, for explaining the movement of a seat body from a raised state to a reclining state.

FIG. 2 is a schematic exploded perspective view of the entire child seat including a link mechanism and a lock mechanism, which characterizes the present invention.

FIG. 3 is a schematic exploded perspective view including a link mechanism and a lock mechanism in the base member in the child seat that characterizes the present invention.

FIG. 4 is an enlarged view of the locking mechanism in FIG.
(A) is a schematic diagram of a bracket and a stopper tooth which constitute this locking mechanism, and (b) is an enlarged view of a main part of the stopper tooth.

FIG. 5 is an enlarged view for explaining a configuration of a main part of the lock mechanism shown in FIGS. 3 and 4.

FIG. 6 is a schematic side view showing a state where the seat body of the child seat is raised.

FIG. 7 is a schematic side view showing a state in which the seat body of the child seat is reclined.

FIG. 8 is a schematic side view for explaining a conventional reclining child seat.

[Explanation of symbols]

 1 Child Seat 4 Seat Body 4a Seating Part 4b Backrest Part 5 Base Member 10 Shaft 11 Link Mechanism 12 Locking Mechanism 20 Base Frame 21 Bracket 21a Long Hole 22 Bracket 22a Long Hole 23 Pipe Frame 24 Pipe Frame 25 Link Shaft 26 Link Arm 27 Link Arm 30 Special Bolt 31 Special Bolt 32 Adjust Lever 32b Lever Part 33 Arm Part 33a Special Pin 34 Arm Part 34a Special Pin 35 Roller 36 Roller 37 Spring 40 Stopper Tooth 40b Locking Groove 40c Locking Groove 40d Locking Groove 41 Stopper Tooth 41b Stop groove 41c Locking groove 41d Locking groove 42 Pin (shaft supporting part) 43 Pin (shaft supporting part) 44 Fixing bracket 50 Locking groove 50a Arc-shaped engaging surface 50b Etch J portion 50c First inclined surface 50d Second inclined surface J First rotation center G Second rotation center

Claims (1)

[Claims] 1. A child seat mounted on a seat cushion of an adult vehicle seat and assembled and held by an adult seat belt, wherein the child seat is mounted on a seat cushion of the adult seat. The seat member includes a base member and a seat body that is disposed so as to be capable of reclining operation on the base member and includes a seat portion and a backrest portion. The backrest portion of the seat body is rotatably supported with respect to the base member. A shaft is provided below the seating portion of the seat body so as to extend in the left-right direction of the seat, and the base member supports the shaft so as to be slidable in the front-back direction of the seat and is locked and fixed at a predetermined position And a lock mechanism for locking the seat body below the seating portion of the seat body. A bracket provided with a long hole into which a shaft provided in the seat is slidably inserted in the seat front-rear direction and erected on the base member side; and a stopper tooth rotatably provided with respect to the bracket. The stopper tooth has locking grooves at a plurality of positions that selectively lock the shaft by facing a predetermined position in the elongated hole on the bracket side, and a position where the locking groove faces the elongated hole. And a retractable position which is configured to be rotated by an external operation.