JP2004217038A - Child seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a child seat which can perform an impact absorbing action at the time of an accident of a vehicle or the like, and at the same time, for which a child seat body is formed into a light-weight and compact structure. <P>SOLUTION: This child seat is fitted on a seat of the vehicle in a manner to face to the reverse direction from the advancing direction of the vehicle. A back part 35 of the child seat 31 is swingably connected with a seat part 34, and at the same time, impact absorbing mechanisms 39, 40 and 44 are provided on confronted surfaces with the seat part 34 and the back part 35 on side surfaces of the child seat. In this case, the impact absorbing mechanisms 39, 40 and 44 alleviate an impact force when the impact force to the rear surface side is applied to the child seat 31 from the front surface side of the child seat. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a child seat, and more particularly to a child seat that can be attached to and detached from a vehicle seat and that can reduce an impact force applied to an infant during a vehicle collision or the like.
[0002]
[Prior art]
Generally, a child seat is used when an infant under six years old is put on a passenger car. In particular, when an infant weighing 10 kg is to be placed on a child seat, the neck is not yet set, so that the angle between the seat portion and the back portion of the child seat is widened so that the child seat is held close to the back and the child seat is mounted on the vehicle. Is held backward with respect to the traveling direction of the child, and the body of the infant is fixed to the child seat with a belt.
[0003]
However, when the vehicle receives a shock from the front in such a state, the reaction tends to move the infant forward, and the impact concentrates on the shoulder portion of the infant via the shoulder belt. In particular, there is a problem that the load on the shoulder increases as the reclining state is lowered, that is, the state is set down.
[0004]
Accordingly, a child seat has been proposed that can reduce the impact received by the infant's body even in the event of a vehicle collision, even if the infant is normally kept close to his / her back (see Japanese Patent Application No. 2001-251306).
[0005]
FIG. 5 is a view showing a schematic configuration of a child seat capable of reducing the impact received by the infant body. The child seat 13 is provided on the seat 11 and the back 12 of the vehicle seat 10 in a rearward direction with respect to the traveling direction A. It is fixed with a seat belt or the like. The child seat 13 has a bucket-shaped child seat body 14, and the child seat body 14 is provided with a back portion 16 that can swing about a rotation shaft 15 fixed to the child seat body 14. At the lower end of the back portion 16, a seat portion 18 is provided via a connecting portion 17 so as to be rotatable with respect to the back portion 16. The front end 19 of the seat 18 is guided by a guide 20 in a substantially front-rear direction. Therefore, when the back portion 16 rotates back and forth about the rotation shaft 15, the seat portion 18 connected to the back portion 16 by the connecting portion 17 moves substantially in the front-back direction with the front end portion 19 being guided. It has become.
[0006]
The back portion 16 and the seat portion 18 are supported by biasing springs 21 and 22 provided on the child seat body 14, respectively. In a normal state, the back portion 16 is inclined at an angle θ with respect to the vertical, and Are held so as to be inclined such that the front end 19 is higher than the connecting portion 17. And the back part 16 and the seat part 18 are arrange | positioned by side view substantially L shape.
[0007]
Further, an impact absorbing mechanism 23, the other end of which is supported by the child seat body 14, is connected to the connecting portion 17 so as to be activated when a strong impact at the time of collision is applied.
[0008]
In such a child seat 13, an infant sits backward with respect to the traveling direction A and is fixed with a belt or the like.
[0009]
Therefore, when the inertia force F is applied to the infant at the time of a vehicle collision or the like, since the point of action of the inertia force F is below the rotating shaft 15, the back portion 16 pushes the urging spring 21 as shown in FIG. It turns counterclockwise against the pressure and the pulling force of the biasing spring 22, and the back 16 rises. Further, the seat 18 is also pulled by the back 16 via the connecting portion 17 and moves rightward in FIG. At this time, the front end 19 of the seat 18 is guided by the guide 20. As described above, since the back portion 16 rises due to the inertial force F, the inertial force F is received by the entire back of the infant, so that the load can be prevented from being concentrated on a part of the body such as the shoulder. Further, when a large inertial force F is applied to the infant during a vehicle collision, the shock absorbing mechanism 23 operates, and the impact force on the infant can be reduced and attenuated. In this case, the back 16 rises further in the vertical direction, and the angle with respect to the vertical decreases from θ to θ ′. For this reason, the infant receives the inertial force F on the entire back and can prevent the load from being concentrated on a part of the body such as the shoulder.
[0010]
[Patent Document 1]
Japanese Patent Application No. 2001-251306
[Problems to be solved by the invention]
However, as described above, the child seat provided with the shock absorbing mechanism is large in size because of incorporating the shock absorbing mechanism, and when the child seat is attached to a stroller and can be used as a stroller seat, the stroller itself is used. Must be increased in size, and furthermore, it is difficult to provide a reclining function because of the built-in shock absorbing mechanism.
[0012]
In view of the above, an object of the present invention is to provide a child seat that can perform a shock absorbing action, can have a lightweight and compact structure of a child seat body, and can be easily attached to a stroller. I do.
[0013]
[Means for Solving the Problems]
The invention according to claim 1 is a child seat adapted to be mounted on a vehicle seat with its back in the traveling direction of the vehicle, wherein the back portion of the child seat is swingably connected to a seat portion, and On the side opposite to the seat and the back on the side surface of the child seat, an impact absorbing mechanism is provided to reduce the impact force when an impact force is applied to the child seat from the front side to the rear side of the child seat. I do.
[0014]
According to a second aspect of the present invention, in the first aspect of the present invention, in the shock absorbing mechanism, an arc-shaped groove centered on a swing axis of the back is formed in one of the seat and the back. On the other hand, an impact absorbing projection which engages with the concave groove and slides along the concave groove is fixedly provided, and the impact absorbing projection is provided in the concave groove when the back moves in the rising direction. And a shock absorbing spring for absorbing the shock in the rising direction of the back portion is provided.
[0015]
A third aspect of the present invention is the invention according to the first or second aspect, wherein a plurality of latch teeth extending in the left-right direction are arranged in an arc shape on one of the seat portion and the back portion around the swing axis of the back portion. At the same time, the other end is provided with a latch claw which engages with the above-mentioned latch teeth and allows the back part to swing in the upright direction but prevents movement in the falling direction.
[0016]
The invention according to claim 4 is the invention according to claim 2 or 3, wherein the shock absorbing projection and the latch tooth are provided on the outer side surface of the back portion, and the concave groove and the latch claw engage with the shock absorbing projection. Is provided on the inner surface of the seat.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a view showing a state in which a child seat of the present invention is mounted on a vehicle seat. A child seat 31 is fixed to a vehicle seat 32 by a seat belt 33. The child seat 31 includes a seat portion 34 and a back portion 35 that is swingably connected to the seat portion 34. The child seat 31 includes a seat portion 34 and a back portion 35 on both sides of the child seat 31 facing the seat portion 34 and the back portion 35. An impact absorbing mechanism is provided to reduce the impact force when an impact force is applied to the child seat from the front side to the rear side of the child seat.
[0018]
FIG. 2 is an exploded perspective view of the child seat 31. A shock absorbing seat unit 36 is fixed to the inner surfaces of the left and right side walls 34a of the seat portion 34, and the shock absorbing seat unit 36 is fixed to the outer surfaces of the left and right side walls 35a of the back portion 35. The back unit 37 is fixed. A bearing recess 36a is formed on the inner surface side of the left and right shock absorbing seat units 36, and the swing shaft 37a protruding from the outer surface of the shock absorbing back unit 37 is inserted into the bearing recess 36a. The back 35 is swingably connected to the seat 34 relatively.
[0019]
As shown in an enlarged view in FIG. 3, two arc-shaped concave grooves 39 centering on the bearing concave portion 36a are provided on the inner surface side of the shock absorbing seat unit 36. On the outer surface of the back unit 37, there are provided shock absorbing projections 40 slidably engaged with the concave grooves 39, respectively.
[0020]
By the way, a lid member 42 provided with an arc-shaped opening 41 at a position corresponding to the concave groove 39 is attached to the inner surface side of each of the shock absorbing seat units 36, and the shock absorbing back units 37 are arranged on the inner surfaces thereof. The shock absorbing projections 40 protruding from the shock absorbing back unit 37 are slidably inserted into the concave grooves 39 through the openings 41, respectively.
[0021]
A widened portion 39a is formed at an intermediate portion of the concave groove 39, and an impact absorbing spring 44 is disposed between a spring receiver 43 disposed in the widened portion 39a and an end wall of the concave groove 39. When the impact-absorbing projection 40 comes into contact with the spring receiver 43, the back portion 35 is urged in the falling direction (counterclockwise in FIG. 2) via the impact-absorbing projection 40. A spring force adjusting bolt 45 is provided on the side of the shock absorbing spring 44 opposite to the spring receiver 43.
[0022]
On the other hand, on the outer surface of the shock absorbing back unit 37, latch teeth 46 having a plurality of teeth extending in the left-right direction are further arranged in an arc around the axis 38 of the swing shaft 37a. A latch claw 47 that engages with the latch teeth 46 and prevents the back part 35 from moving in the falling direction is mounted on the inner surface of the unit unit 36 so as to swing along the inner surface of the shock absorbing seat unit 36. I have. The latch claw 47 has a pin 48 projecting from the latch claw 47 on the side opposite to the engagement portion with the latch tooth 46, and a projection protruding from the pin 48 and the shock absorbing seat unit 36. The latch pawl 47 is urged in the direction of engagement with the latch teeth 46 by a spring 50 stretched between the latch claw 47 and the latch claw 47. The pin 48 protrudes outward from a long hole 51 formed in the shock absorbing seat unit 36, and its projecting portion (not shown) operates clockwise in FIG. 3 against the spring 50. Thus, the latch pawl 47 can be removed from the latch teeth 46.
[0023]
Thus, as shown in FIG. 4A, when a child is placed on the child seat mounted on the seat 32 of the vehicle, if a large impact occurs on the child seat from the front of the vehicle due to a vehicle accident or the like, FIG. As shown in b), the child seat 31 rotates around the back guide 52 of the seat belt. Then, when the play of the seat belt 33 is completely eliminated, as shown in FIG. 4 (c), the back portion 35 rotates in the rising direction with respect to the seat portion 34 due to the force of the seat portion 34 moving forward. Finally, when the back portion 35 rises, the impact on the infant is received by the entire back portion 35, and the impact is distributed to the shoulder and the back portion of the infant, and the impact is reduced. In addition, at this time, when the back portion 35 of the child seat swings in the rising direction and the impact absorbing projection 40 abuts against the spring receiver 43, the impact force is further absorbed by the impact absorbing spring 44, and the injury to the infant is reduced. be able to.
[0024]
In addition, the engagement of the latch claws 47 provided on the shock absorbing back unit 36 with the latch teeth 34 provided on the shock absorbing seat unit 37 holds the back 35 in a vertically upright state.
[0025]
In the above embodiment, the shock absorbing seat unit 36 is provided with the concave groove 39 and the shock absorbing back unit 37 is provided with the shock absorbing projection 40. May be provided with a shock absorbing projection 40 and the shock absorbing back unit 37 may be provided with a concave groove 39.
[0026]
【The invention's effect】
As described above, the present invention relates to a child seat that is mounted on a vehicle seat with its back in the traveling direction of the vehicle, wherein the back portion of the child seat is swingably connected to a seat portion. Since an impact absorbing mechanism is provided on an opposite surface of the seat portion and the back portion on the side surface of the child seat, when the impact force from the front side to the rear side of the child seat is applied to the child seat, the impact force is reduced. The impact force applied to the infant can be effectively reduced, the impact absorbing structure can be formed small, and the child seat body itself can be made lightweight and compact.
[Brief description of the drawings]
FIG. 1 is a perspective view of a child seat according to the present invention.
FIG. 2 is an exploded perspective view of a seat portion and a back portion of the child seat of the present invention.
FIG. 3 is an exploded perspective view of a shock absorbing unit.
FIG. 4 is an operation explanatory view.
FIG. 5 is a schematic side view of a child seat according to the prior art.
FIG. 6 is a schematic side view showing a state where an impact is applied to the child seat shown in FIG. 5;
[Explanation of symbols]
31 Child seat 32 Vehicle seat 33 Seat belt 34 Seat 34a Side wall 35 Back 35a Side wall 36 Shock absorbing seat unit 37 Shock absorbing back unit 39 Groove 40 Shock absorbing projection 41 Opening 42 Lid member 43 Spring receiver 44 Shock absorbing Spring 45 Spring adjustment bolt 46 Latch tooth 47 Latch pawl 48 Pin 49 Projection 50 Spring 51 Slot

Claims (4)

In a child seat that is attached to the vehicle seat with its back in the traveling direction of the vehicle, the back portion of the child seat is swingably connected to a seat portion, and the seat portion and the back portion on the side surface of the child seat. A child seat provided with an impact absorbing mechanism for reducing the impact when an impact is applied to the child seat from the front side to the rear side of the child seat. In the shock absorbing mechanism, an arc-shaped groove centered on the swing axis of the back is formed on one of the seat and the back, and the other is engaged with the groove and engaged with the groove. A shock absorbing projection that slides along is fixed, and the shock absorbing projection abuts in the recess when the back moves in the rising direction, and absorbs the shock in the rising direction of the back. The child seat according to claim 1, further comprising a spring. A plurality of latch teeth extending in the left-right direction are arranged in one of the seat portion and the back portion in an arc shape about the swing axis of the back portion, and the other latch teeth are engaged with the latch teeth and the back portion stands upright. The child seat according to claim 1 or 2, further comprising a latch claw that allows swinging in the direction but prevents movement in the falling direction. 3. A shock absorbing projection and a latch tooth are provided on an outer surface of a back portion, and a concave groove and a latch claw with which the impact absorbing projection is engaged are provided on an inner surface of a seat portion. Or the child seat according to 3.

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