JP2973579B2 - Seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat mounted on a vehicle or the like integrally provided with a child seat.

[0003]

2. Description of the Related Art Conventionally, as a seat of this type, there is a Japanese Utility Model Showa 6
The thing shown by 3-34632 gazette is known.
This has a seat cushion and a seat back arranged at the rear of the seat cushion,
A seat having a seat back main body part forming a part thereof and a child body restraining mechanism forming a part thereof in a retracted state, wherein the child body restraining mechanism is rotatable on a seat back frame. A lower backrest portion supported by the lower backrest portion, an upper backrest portion detachably disposed on the lower backrest portion and connected to belt waving accommodated in the seat back, and a lower backrest portion provided at the lower backrest portion to remove the upper backrest portion. And a locking member that locks in the state. In this conventional apparatus, the lower backrest portion is rotated forward to be placed on the seat cushion, the upper backrest portion is removed from the seatback, the belt webbing is pulled out, and the lower backrest portion is locked by the locking member. The upper backrest functions as a chest support member, and the belt waving functions as a shoulder support member. Thus, the seat becomes a child seat that holds the occupant using the child body restraint mechanism from a normal seat that holds the occupant using a normal body restraint mechanism such as a three-point seat belt. .

[0004]

However, with the above-mentioned seat, it is not possible to reliably hold the occupant when seating for a child. In particular, in the left-right direction, the holdability was remarkably reduced.

[0005] Therefore, an object of the present invention is to improve the holdability of a occupant when seating for a child.

[0006]

Configuration of the Invention

[0007]

In order to solve the above-mentioned technical problem, the technical means taken in the present invention is to provide a child restraint mechanism by a lower backrest portion rotatably slidably supported by a seat back frame. An upper back portion slidably supported by the seat back frame and linked to the lower back portion, a side support portion rotatably supported by the seat back frame and linked to the lower back portion, A headrest portion detachably disposed on the upper backrest portion and connected to belt waving accommodated in the seat back; and a locking member provided on the lower backrest portion for locking the headrest portion in a detached state. That is, it has a configuration.

[0008]

The above technical means operates as follows. When the upper backrest portion is slid downward, the lower backrest portion is pivotally slid and placed on the seat cushion, and the side support portion is pivotally protruded forward. Furthermore,
The headless part is removed from the seat back, and the belt webbing is pulled out and locked by the locking member. As a result, the seat becomes a seat for a child from a normal seat, the upper back portion functions as a seat back, the lower back portion functions as a seat cushion, the headless portion functions as a chest support member, and the belt waving functions as a shoulder support member. I do. Thereby, the seated person is reliably held in the front-back, up-down, and left-right directions, and the holding performance can be improved.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG.
Is comprised of a seat cushion 2 and a seat back 3 disposed at the rear of the seat cushion 2. The seat back 3 includes a seat back body 4 that forms a part of the seat back 3 and a child body restraining mechanism 5 that forms a part of the seat back 3 in a retracted state. Lower backrest portion 6, upper backrest portion 7, side support portion 8, headless portion 9, belt webbing 10, and locking member 11
It is composed of

As shown in FIGS. 3 to 5, the seat back body 3 has a base frame 12 inside. An upright wall portion 12a bent forward and a flange portion 12b bent laterally from the upright wall portion 12a are formed continuously on both side ends of the base frame 12, respectively.

A side support frame 13 constituting the side support portion 8 is rotatably supported on the base frame 12 via a hinge 14. Between the side support frame 13 and the base frame 12, there is provided a spring 15 having one end locked to the side support frame 13 and the other end locked to a flange portion 12b of the base frame 12.
The spring 3 is constantly urged by the urging force of the spring 15 in the retracted direction (counterclockwise around the hinge 14 shown in FIG. 5). A stay 16 is fixed to the side support frame 13.

A stay 18 is fixed to a lower back frame 17 constituting the lower back portion 6. Guide slots 19 extending in the up-down direction are formed on the vertical wall portion 12a of the base frame 12, and both ends of the stay 18 are slidably supported by the guide slots 19. Thereby, the lower backrest frame 17 is supported slidably in the up-down direction with respect to the base frame 12. At the lower end of the lower backrest portion 6, a buckle 26 constituting the locking member 11 is fixed.

A stay 21 is fixed to the upper backrest frame 20 constituting the upper backrest portion 7. Guide slots 22 extending in the vertical direction are formed on the upright wall portion 12a of the base frame 12, and both ends of the stay 21 are slidably supported by the guide slots 22. Thereby, the upper backrest frame 20 is supported slidably in the up-down direction with respect to the base plate 12. The upper backrest frame 20 is connected to the lower backrest frame 17 via a hinge 23, so that the upper backrest frame 20 and the lower backrest frame 17 are relatively rotatable.

A guide stay 24 is provided outside the standing wall 12a of the base frame 12. The guide stay 24 has an elongated hole 24a extending vertically and a projecting portion 24b projecting outward. An upper back frame 20 is provided in the elongated hole 24a of the guide stay 24.
The both ends of the stay 21 are supported, and the guide stay 2
The fourth protruding portion 24b can contact the stay 16. A spring 25 is provided between the guide stay 24 and the base frame 12, one end of which is locked by the guide stay 24 and the other end of which is locked by the flange portion 12a. The guide stay 24 is constantly urged in the initial position direction (upward direction shown in FIG. 5) in the retracted state by receiving the urging force of the spring 25.

A screw 27 is rotatably supported on the base frame 12 via a bearing 28. A nut member 29 is fixed to the upper backrest frame 20, and the nut member 29 is screwed to the screw 27.
A motor 32 is connected to the screw 27 via a gear mechanism 30 and a shaft 31.

The guide slot 19 is set shorter than the guide slot 22. The upper end of the guide slot 19 is set lower than the upper end of the guide slot 22 by the offset of the stay 21 and the stay 18, and the lower end is connected to the upper backrest frame 20. It is inclined forward by the offset between the hinge 23 and the stay 18 and the offset between the stay 10 and the stay 21 in accordance with the relative rotation with the lower backrest frame 17 and is set above the lower end of the guide slot 22. The elongated hole 24a is set shorter than the guide slot 22, and the upper end of the elongated hole 24a is set to coincide with the upper end of the guide slot 22, and the lower end of the elongated hole 24a is also set upward.

As shown in FIGS. 1 and 2, the headless portion 9 is detachably supported by the upper backrest portion 7. The belt webbing 10 is connected to the headless portion 7, and is linked to a retractor mechanism (not shown) disposed on the back side of the seat back body 4 via a belt insertion opening 4 a formed in the seat back body 4. I have.

Next, the operation of the present invention will be described.

FIGS. 1 and 3 show a normal use state in which the seat back 3 is constituted by a child body restraining mechanism 5 and a seat back body 4, and a lower backrest portion 6, an upper backrest portion 7, a side support portion 8 and The belt waving 10 is in the stored state and the headless portion 9 is in the worn state. In this state, the seat 1 is in a state where an adult or the like with a large physique can sit down using a normal body restraining mechanism such as a three-point seat belt. In this state, when the motor 32 is operated, the upper backrest portion 7 is guided by the guide slot 22 and slides downward.
At this time, the headless portion 9 is disengaged from the upper backrest portion 7 due to the sliding of the upper backrest portion 7. The lower backrest portion 6 is guided by the guide slot 19 and slides downward in conjunction with the sliding of the upper backrest portion 7. When the stay 18 is located at the lower end of the guide slot 19, it is guided by the inclination of the lower end of the guide slot 19 and the hinge 23 is moved. Rotate to the center. At this time, the guide stay 24 is pressed by the stay 21 and slides downward together with the upper backrest portion 7 against the urging force of the spring 25 to come into contact with the stay 16, and as a result, the side support portion 8
Rotates against the urging force of the spring 25. Thereby, as shown in FIG. 2 and FIG.
Is positioned below as a child seat back 7A, the lower backrest portion 6 is placed on the seat cushion 2 to serve as a child seat cushion 6A, and the side support portions 8 protrude forward to provide a child seat back 7A. Side support 8
Each functions as A. Further, the headless portion 9 is locked by the locking member 11. As a result, as shown in FIGS. 2 and 4, the headless portion 9 functions as a child's chest support member 9A and the belt waving 1
0 is pulled out from the retractor mechanism via the belt insertion opening 4a and functions as the shoulder support member 10A. As a result, as shown in FIGS. 2 and 4, the seat 1 is a child seat 1A on which a child can be held and seated.

As described above, in the child seat 1A, the left and right directions can be reliably held by the side support portion 8, the front direction can be held by the headless portion 9, and the upward direction can be held by the belt webbing 10, respectively. , Hold performance can be improved. or,
Since the mechanism for making the child's seat 1A is all mounted on the seat back 3, it can be used in any seat by replacing only the seat back 3 and can be highly versatile. .

[0022]

According to the present invention, there is provided a seat cushion and a seat back provided at the rear of the seat cushion. And a child restraint mechanism comprising: a lower backrest portion rotatably slidably supported by the seatback frame; and a lower backrest portion rotatably slidably supported by the seatback frame. An upper back portion slidably supported and linked to the lower back portion, a side support portion rotatably supported by the seat back frame and linked to the lower back portion, and detachably attached to the upper back portion. A headrest portion connected to a belt waving housed in the seat back and disposed in the seat back; Since the Hetsudoresuto portion provided on the backrest portion to constitute a seat and a locking member for locking in its de-state has the following effect can.

As a child seat, a seated person can be securely held in front and rear, up and down, and left and right directions.
Hold performance can be improved.

By exchanging only the seat back, the seat back can be used in any seat, and the versatility can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a normal use state of a seat according to the present invention.

FIG. 2 is a perspective view corresponding to FIG. 1 showing a use state for a child.

FIG. 3 is a perspective view corresponding to FIG. 1 of the child restraint mechanism.

FIG. 4 is a perspective view corresponding to FIG. 2 of the child body restraint mechanism.

FIG. 5 is an exploded perspective view of the child body restraining mechanism.

[Explanation of symbols]

 2 Seat cushion 3 Seat back 4 Seat back main body 5 Child restraint mechanism 6 Lower backrest 7 Upper backrest 8 Side support 9 Headless 10 Belt webbing 11 Locking member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60N 2/00-2/54 B60R 22/10

Claims (1)

(57) [Claims] 1. A seat cushion comprising: a seat cushion; and a seat back disposed at a rear portion of the seat cushion, wherein the seat back forms a part of the seat back body and a part thereof in a stored state. In a seat having a child body restraining mechanism, the child body restraining mechanism is rotatably slidably supported by the seat back frame, and slidably supported by the seat back frame. An upper backrest portion connected to the lower backrest portion, a side support portion rotatably supported by the seat back frame and linked to the lower backrest portion, and removably disposed on the upper backrest portion. A headrest portion connected to belt waving housed in the seat back, and the lower backrest portion; A locking member which is provided on the head and locks the headless portion in its detached state.