JP3229477B2 - Lock mechanism for built-in child seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in type child seat which can also be used as an armrest and can be stored in a storage recess of the seat body under rotation about a hinge when the seat body is folded. , At least in a use position.

[0002]

2. Description of the Related Art A child seat cushion (child cushion) and a child seat back (child back) are formed to have a combination of a child's body shape and posture, etc. Child seats that ensure the safety of vehicles are widely provided, for example, in automobiles and the like.

[0003] As such a child seat, for example, there is known a dual-purpose structure which can be used as an armrest of a seated person on a seat body when a child back is moved forward. Such a dual-purpose child seat is configured as a so-called built-in type that can be stored in the storage recess of the seat body under the operation of raising the child cushion centering on the hinge pin with the child back.

[0004]

However, in such a child seat, a seat belt (child) is restrained and held by a child seat belt. Therefore, in an emergency such as a sudden stop of an automobile, the child seat is excessively large. A large load acts on the child seat via the seat belt. Normally, the seat body is connected and fixed to the body (floor surface) of the vehicle by a dedicated lock mechanism or the like, but sufficient holding force can no longer be obtained against an excessive load acting on the child seat. There is a risk of disappearing.

Therefore, a configuration is known in which the child seat is connected and fixed to a body or the like by another lock mechanism. In such a configuration, since the child seat is directly connected to the body or the like by the child seat lock mechanism, the child seat, that is, the infant can reliably be prevented from jumping out by increasing the holding force of the child seat.

However, in such a configuration, the locking mechanism becomes two, and in order to tumble the seat body, it is necessary to release the lock under a separate operation, so that the seat body is tumbled. Operational complexity is inevitable.

In view of the above, it is conceivable that the two lock mechanisms can be interlocked and the two can be unlocked in synchronization by operating one lever. However, when the two lock mechanisms can be interlocked, Since the operation levers or the lock mechanisms must be connected by a link, a cable, or the like, the configuration is likely to be complicated.

An object of the present invention is to provide a lock mechanism for a built-in type child seat which simplifies the configuration and improves the operability by integrating the seat body and the child seat lock mechanism.

[0009]

According to an embodiment of the present invention, a support pin is provided at a position separated from a hinge pin by a predetermined distance, and is provided in parallel with the hinge pin. A lock arm having at one end a hook engageable with an anchor fixed to the floor surface is rotatably supported with respect to the base member to be mounted.

[0010] The extension of the lock arm is extended on the movement locus of the support pin, and the child seat is stored against the biasing force of the return spring biasing the lock arm in the locking direction between the hook and the anchor. The lock between the hook and the anchor can be released by pressing the extension piece with the support pin.

[0011]

According to the present invention, since the lock between the lock arm and the fixed anchor on the side of the seat body is released in conjunction with the storage of the child seat, the operation of the seat body during tumble is reliably prevented from becoming complicated. Is done.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in the lock mechanism 10 of the built-in type child seat according to the present invention, the support pin 12 projects parallel to the hinge pin at a position separated from the hinge pin 14 by a predetermined distance. .

(Built-in type) The child seat 16 is
For example, it is formed to have a combination of a child seat cushion (child cushion) 18 and a child seat back (child back) 20, and the child back can swing with respect to the child cushion via a support rod 30 serving as a hinge. Connected and supported.

In such a child seat 16, for example, the child cushion 18 is moved up from the use position shown in FIG. 1 around the hinge pin 14 as shown in FIG. The main body, for example, a storage recess 24 a formed in the seat back 24 of the rear seat 22 can be stored together with the child back 20.

Incidentally, such a child seat 16 is
For example, a child back 20 in the use position shown in FIG.
, The seat can be used as an armrest for the occupant of the rear seat (seat body) 22 (see the two-dot chain line in FIG. 1).

As shown in FIGS. 1 and 2, the cushion frame 18a forming the framework of the child cushion 18 is formed, for example, with brackets 26 provided with the hinge pins 14 protruding on the left and right sides of the rear end, respectively. , Seat back
The child cushion is swingably attached to the seat back by the pivotal support of the hinge pins on the pair of base brackets 28 fixed to the base bracket 24.

For example, each end of the support rod 30 erected and fixed between the left and right sides of the back frame 20a of the child back 20 is extended from the back frame, and is supported by a bracket at the extended end by the bracket 26. A child back is swingably connected to and supported by the child cushion 18. Normally, the support rod 30 is pivotally supported at a position separated from the hinge pin 14 by a specific distance.

Here, as can be seen clearly from FIG.
In the present invention, focusing on the fact that the support rod 30 is disposed apart from the hinge pin 14 by a predetermined distance, and further extending each end of the support rod, the extended end is used as the support pin 12. Has formed.

As shown in FIGS. 1 and 2, the base bracket 28 is formed to have a guide hole 32 having a width that allows the support pin 12 to be loosely inserted. The guide hole 32 is formed in an arc shape having the hinge pin 14 as a center and the radius between the hinge pin and the support pin 12 as a radius, and formed over a range that guarantees the swing of the child cushion 18 between the use position and the storage position.

As can be seen from FIGS. 1 to 3, in the lock mechanism 10 of the built-in type child seat according to the present invention, the body of the automobile, that is, the floor 34
A lock arm 38 having a hook 38a capable of engaging (locking) with an anchor 36 fixed to the like is rotatably attached to the base bracket 28 via a support pin 40, for example.

Here, in the present invention, an extension piece 38b extending and arranged on the movement locus of the support pin 12, that is, so as to overlap the guide hole 32, is formed integrally with the lock arm 38. I have. As you can see in Figure 1,
The extension piece 38b extends in a direction positioned on the movement locus of the support pin 12 when locking (engaging) between the hook 38a and the anchor 36.

As shown in FIGS. 1 and 2, the lock arm 38 is held at the lock position under the engagement of the extension piece 38b with the lock pin 42 projecting from the base bracket 28. Have been.

As shown in FIGS. 1 and 2, such a lock arm 38 is normally biased by a return spring 44 in the locking direction of the hook 38a to the anchor 36. As the return spring 44, for example, the lock arm and the base bracket can be displaced in the locking direction.
A tension coil spring stretched between the lower ends of 28 can be used.

In the built-in type child seat lock mechanism 10 having such a configuration, for example, as shown in FIG. 1, it is assumed that at least the pulled-out use position of the child cushion 18 is the initial position of the child seat 16. In this initial position, the support pin 12 is located at the upper end of the guide hole 32 and the hook 38a of the lock arm is attached to the anchor 36 of the body 34 under the biasing force of the return spring (tension coil spring) 44. Locked against.

In such a state, the forward movement of the seat back 24 with respect to the seat cushion 46 is restricted under the connection between the lock arm 38 on the seat body side and the anchor 36 on the body side.

At the initial position of the locked child seat 16 between the hook 38a and the anchor 36, even if an excessive forward load acts on the child seat in an emergency such as a sudden stop, the load is applied to the lock arm 38 and the anchor. Through the vehicle body 34, so that the rear seat 22, that is, the seat body is not adversely affected. That is, the seat body 22 includes the hook 38a, the anchor
Under a lock between 36, it is held in a normal use position with a sufficiently high holding force.

When at least the child cushion 18 is flipped up from the initial position, that is, the use position of the child seat 16, the support pins 12
The center of the guide hole 32 is moved toward the lower end indicated by the solid arrow in FIG.

Here, since the extension piece 38b of the lock arm is located on the movement locus of the support pin 12, the guide hole 32b
With the support pin moving toward the lower end along
The support pin first engages with the extension piece. When the child cushion 18 is further swung in the storage direction from this state, the support pin 12 moves while pressing the extension piece 38b in its own traveling direction, so that the support pin 12 resists the biasing force of the return spring 44. The lock between the hook 38a and the anchor 36 is released by the rotation of the lock arm 38 in the counterclockwise direction (see FIG. 3).

In the unlocked state between the hooks 38a and the anchors 36, the seat back 24 becomes free with respect to the body 34 of the automobile, so that the seat back around the hinge (not shown) for the seat cushion is centered. It is possible to move forward. In this state, since the child seat 16 has already been stored in the storage recess 24a, the child seat does not hinder the forward movement of the seat back 24.

When the seat cushion 46 is flipped up about the hinge (not shown) at the front end of the seat back 24 from the forward tilted state, the seat 22 on which the child seat 16 is mounted, that is, the seat body is folded (tumble). Becomes possible.

That is, in the built-in type child seat lock mechanism 10 of the present invention, the child seat
The tumble of the seat 22 is enabled in conjunction with the storing operation of the 16.

As shown in FIG. 3, when the seat 22 is returned to the normal sitting state, and the child seat 16 is pulled out in this state, the support pins 12 centered on the hinge pins 14 are moved.
, The pressing of the extension piece 38b by the support pin is released. Then, as shown in FIG.
With this biasing force, the lock arm hook 38a and the anchor 36 are locked again, and the seat back 24, that is, the seat 22, is set and held in the use position.

Although not described in detail here, such a retractable child seat 16 is usually formed with a dedicated locking mechanism (not shown),
The child seat is set and held at each position by the lock at the storage position.

As described above, in the lock mechanism 10 of the built-in type child seat of the present invention, the hook 38b of the lock arm is interlocked with the storage of the child seat 16.
The lock between the body anchors 36, that is, the body 34
Is automatically unlocked. That is, the seat 22 is different from the storage operation of the child seat 16.
The seat can be tumbled only by the storing operation of the child seat 16 without performing the unlocking operation for the tread, so that the operability during the tumble is reliably improved.

Since the lock arm 38 is directly rotated in the unlocking direction under the operation of storing the child seat 16, a connecting member such as a link or a cable is not required. Therefore, it is possible to reliably prevent an increase in the number of parts and a complicated configuration caused by the increase in the number of parts.

Further, when used as a child seat or an armrest, since the lock between the hook 38a and the anchor 36 does not occur, the safety and comfort of the occupant in the seat 22 and the infant in the child seat 16 are sufficient. Can be secured.

Then, the support pin 12 parallel to the hinge pin 14 is required to protrude from the bracket 26, and the extension piece 38b of the lock arm is only required to be arranged on the movement locus of the support pin, so that the configuration is not complicated.

If the rear seat 22, that is, the seat body is held in the use position by the lock between the hook 38a and the anchor 36, an excessive forward load acting in an emergency such as a sudden stop will cause an excessive forward load to be applied to the lock arm 38 and the anchor. Therefore, the holding force for the seat body can be secured sufficiently high. for that reason,
According to the present invention, the child seat 16, the REIT body 22
Even if the lock mechanism is integrated, the holding force for each of the child seat and the seat body does not decrease.

In the present invention, since the lock arm 38 is provided on the base bracket 28 of the seat body and the anchor 36 is provided on the floor surface (body) 34, when the seat 22 is tumbled, it protrudes from the floor surface. The member is only an anchor. That is, effective use of the floor surface 34 during tumble of the seat body 22 is easily achieved.

Here, in the embodiment, the return spring
A tension coil spring is illustrated as 44, but the hook 38a
It is sufficient that the lock arm 38 is displaced in the locking direction of the anchor 36 by the above. Therefore, the present invention is not limited to the tension coil spring. Good.

If the return spring 44 is a tension coil spring, a large space is not required for mounting and disposing, and it is sufficient to lock each terminal directly to the lock arm 38 and the base bracket 28. In addition, the complexity of the configuration and the complexity of the operation can be reliably prevented.

Here, in the configuration using a torsion spring as the return spring 44, as shown in FIG. 4, the torsion spring is arranged by winding the lock arm 38 around the pivot pin 40. Each end of the torsion spring (return spring) 44 is locked to the lock arm 38 and the base bracket 28 serving as a base member to which the lock arm is attached, and a biasing force in the locking direction is applied to the lock arm. .

As described above, if the return spring 44 is a torsion spring, in addition to the simplification of the operation, the outward projection of the lock arm 38 can be sufficiently suppressed, so that the space for the return spring can be saved. It will be further enhanced.

The tension spring is not limited to the position shown in the drawing since the return spring 44 composed of a tension coil spring only needs to bias the lock arm 38 in the locking direction between the hook 38a and the anchor 36.

Furthermore, in the embodiment, the end of the support rod 30 of the child back 20 is used as the support pin 12, but it is sufficient if the end protrudes in parallel with the hinge pin at a position away from the hinge pin 14. However, the present invention is not limited to this. For example, as shown in FIG.

However, if the end (extending end) of the support rod 30 is used as the support pin 12, the number of components can be reduced, so that the increase in the number of components and the complication of the configuration due to this are surely ensured. Is prevented.

Further, the support pins 12 are arranged under the loose insertion into the guide holes 32 corresponding to the swing range of the child seat 16 between the use position and the storage position. However, the present invention is not limited to this. For example, the guide hole may be omitted.

However, the support pin is inserted into the guide hole 32.
In the configuration in which the child seat 16 is loosely inserted, the excessive swinging of the child seat 16 from the use position and the storage position is restricted by engagement of each edge of the guide hole with the support pin. The swinging of the child seat can be restricted without providing the seat. Therefore, also in this respect, an increase in the number of parts can be prevented, and the configuration of the child seat lock mechanism 10 can be sufficiently simplified.

If the guide hole 32 and the lock arm 38 are provided in the base bracket 26 on which the hinge pin 14 is supported, as in the embodiment, it is necessary to dispose a dedicated bracket for these as a separate member. Therefore, the configuration can be simplified from this point.

Further, in the embodiment, the anchor 36 is directly fixed to the floor 34, but it is sufficient if the anchor 36 is fixed to the floor. , By indirect fixing via other members, etc.
The anchor may be attached to the floor.

The embodiments described above are for explaining the present invention, and do not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0053]

As described above, according to the lock mechanism of the built-in type child seat according to the present invention, the lock between the hook of the lock arm and the anchor on the floor is automatically released in conjunction with the storage of the child seat. Therefore, it is possible to tumble the seat body without performing an unlocking operation for the seat body. Therefore, the operability during tumble of the seat body is reliably improved.

Since the lock arm is directly rotated in the unlocking direction under the operation of storing the child seat, a connecting member such as a link or a cable is not required. Therefore, the number of parts increases, and
This can surely prevent the configuration from becoming complicated.

Further, it is sufficient to project the support pin in parallel with the hinge pin and extend and arrange the extension piece of the lock arm on the movement locus of the support pin, so that the configuration is not complicated.

In the configuration in which the support pin is loosely inserted into the guide hole, excessive swinging of the child seat from the use position and the storage position is restricted by engagement of each edge of the guide hole with the support pin. Therefore, the swing of the child seat can be restricted without providing a separate member such as a stopper. Therefore, also in this respect, an increase in the number of components can be prevented, and the configuration of the lock mechanism of the child seat can be sufficiently simplified.

Further, if the base bracket on which the hinge pin is pivotally supported is used as a base member to which the lock arm is attached, and a guide hole is provided in the base bracket, it is necessary to provide a dedicated bracket for these as a separate member. Therefore, the configuration can be simplified from this point.

Further, if the extending end of the support rod is used as the support pin, the number of components can be reduced, so that an increase in the number of components and a complicated configuration caused by the increase can be reliably prevented.

Furthermore, if the return spring is a tension coil spring, not much space is required for mounting and disposing, and each terminal is directly locked to the lock arm and the base member to which the lock arm is mounted. Since it is enough, it is possible to reliably prevent the configuration from becoming complicated and the operation from becoming complicated.

Further, if a torsion spring is used as the return spring, in addition to the simplification of the operation, the outward protrusion of the lock arm can be sufficiently suppressed, so that the space for the return spring can be further reduced. Peel off.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a lock mechanism of a built-in type child seat according to the present invention in a use position of a child seat and a use position as an armrest.

FIG. 2 is an exploded perspective view of a lock mechanism of the built-in child seat.

FIG. 3 is a schematic front view of a lock mechanism of the built-in type child seat according to the present invention in a use position of the child seat.

FIG. 4 is a schematic front view of a lock mechanism for a built-in child seat according to a modification of the present invention.

FIG. 5 is an exploded perspective view of a lock mechanism for a built-in child seat according to another modification of the present invention.

[Explanation of symbols]

 10 Lock mechanism for built-in child seat 12 Support pin 14 Hinge pin 16 Child seat 22 Rear seat (seat body) 24a Storage recess 28 Base bracket (base member to be attached) 30 Support rod 32 Guide hole 36 Anchor 38 Lock arm 38a Hook 38b Extension piece 44 Return spring

Claims (6)

(57) [Claims] 1. A child seat cushion having a child seat back that can be moved forward is slidably connected and supported in a storage recess of a seat body via a hinge,
In the built-in type child seat that can also be used as an armrest for the occupant of the seat body when the child seat back is tilted forward at the position where the child seat cushion is used, the support pin is separated from the hinge pin by a predetermined distance. A lock arm protruding in parallel with the hinge pin and having a hook at one end having a hook engageable with an anchor fixed to the floor is rotatably supported with respect to the mounting target base member; The extension of the arm is extended along the movement path of the support pin, and the extension of the support pin accompanying the storage of the child seat against the biasing force of the return spring that biases the lock arm in the locking direction between the hook and the anchor. A built-in toy that allows the lock between the hook and anchor to be released by pressing the piece The lock mechanism of the formula child seat. 2. A child seat cushion having a child seat back which can be moved forward is connected and supported so as to be retractable in a storage recess of a seat body via a hinge,
In the built-in type child seat that can also be used as an armrest for the occupant of the seat body when the child seat back is tilted forward at the position where the child seat cushion is used, the support pin is separated from the hinge pin by a predetermined distance. A fixed base, which is protruded in parallel with the hinge pin and has an arc-shaped guide hole with a radius equal to the distance between the hinge pin and the support pin around the hinge pin and having a playable width for the support pin, is supported by the hinge. A lock arm formed on the bracket and having at one end a hook engageable with a fixed anchor is rotatably supported by the base bracket, and extends an extension piece of the lock arm on a movement locus of the support pin. And deviate the lock arm in the lock direction between the hook and anchor. Against the biasing force of the return spring, the pressing of the extension piece with the support pin caused by the storage of the child seat, hook releasably locks between anchor and the built-in child seat locking mechanism. 3. The built-in type child seat lock mechanism according to claim 1, wherein a terminal of a support rod for supporting the child seat back so as to be able to lean forward with respect to the child seat cushion is formed as a support pin by extension of a predetermined length. 4. A child seat cushion having a child seat back that can be moved forward and retractably connected and supported in a storage recess of a seat body via a hinge,
In the built-in type child seat that can also be used as an armrest for the occupant of the seat body when the child seat back is moved forward at the position where the child seat cushion is used, the child seat back is supported to be able to be moved forward with respect to the child seat cushion. The end of the support rod to be extended by a predetermined length is formed as a support pin. A lock arm formed at a fixed base bracket that is pivotally supported by a hinge and having a hook at one end capable of engaging with an anchor fixed to the floor surface,
Pivotally supported by the base bracket, the extension end of the lock arm extends along the movement trajectory of the support pin, and resists the biasing force of the return spring that biases the lock arm in the locking direction between the hook and the anchor; A lock mechanism for a built-in child seat that allows the lock between the hook and anchor to be released by pressing the extended end with the support pin during storage of the child seat. 5. The return spring according to claim 1, wherein the return spring is a tension coil spring stretched between the lock arm and a base member to which the lock arm is attached so that the lock arm can be biased in the lock direction. The lock mechanism for the built-in child seat according to any one of the above. 6. A return spring, wherein each terminal is locked to the lock arm and a target base member of the lock arm so as to be able to bias the lock arm in the locking direction, and is wound around a support pin of the lock arm. The lock mechanism for a built-in type child seat according to any one of claims 1 to 4, wherein the lock mechanism is a torsion spring.