JPH07205698A - Locking mechanism for built-in type child seat - Google Patents

Abstract

PURPOSE:To simplify the constitution of a lock mechanism and improve the operation performance by integrally forming each lock mechanism for a seat body and a child seat. CONSTITUTION:A support pin 12 parallel to a hinge pin 14 is inserted into a guide hole 32 on a base bracket 28. A lock arm 38 having a hook 38a engaged with an anchor 36 and an extension end 38b which can be engaged with the support pin 12 is supported in a turnable manner for the base bracket 28, and through the engagement of the support pin 12 with the extension end 38b, accompanied with the accommodation of a child cushion 16, the lock between the hook and the anchor can be released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in child seat which can also be used as an armrest and which can be stored in a storage recess of the seat body under rotation about a hinge when the seat body is folded. , At least with respect to a locking mechanism that holds it 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 combined to suit the body shape and posture of the child, and are formed to prevent the posture from collapsing or popping out when the child runs. Child seats that ensure the safety of vehicles are widely provided, for example, in automobiles.

As such a child seat, for example, there is known a dual-purpose structure which can be used as an armrest for a seated person on the seat body when the child back is tilted forward. Such a combined-use 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 upward movement of the child cushion centering on the hinge pin accompanied by the child back.

[0004]

By the way, in such a child seat, the seat belt for the child restrains and holds the seated person (infant). Therefore, in an emergency such as an abrupt stop of the vehicle, an excessive forward movement is caused. 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 an automobile by a dedicated lock mechanism, etc., 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, there is known a structure in which the child seat is connected and fixed to the 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 locking mechanism, the holding force of the child seat is increased, so that the child seat, that is, the infant can be reliably prevented from jumping out.

However, in such a structure, the number of lock mechanisms is two, and in order to tumble the seat body, the lock has to be released under an individual operation, so the seat body is tumbled. Inevitably, the operation becomes complicated.

Therefore, it is conceivable that the two lock mechanisms can be interlocked with each other and the locks can be unlocked in synchronization by operating one lever or the like. However, when the two lock mechanisms can be interlocked, Since the operation levers or the lock mechanisms must be connected by a link or a cable, the configuration tends to be complicated.

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

[0009]

In order to achieve this object, according to one embodiment of the present invention, a support pin is provided parallel to the hinge pin at a position separated from the hinge pin by a predetermined distance. A lock arm having at one end a hook that can be engaged with an anchor fixed to the floor is rotatably supported with respect to the attachment target base member.

Then, the extension piece of the lock arm is extended on the movement locus of the support pin to prevent the biasing force of the return spring which biases the lock arm in the locking direction between the hook and the anchor, thereby accommodating the storage of the child seat. The lock between the hook and anchor can be released by pressing the extension piece with the support pin.

[0011]

According to the present invention, the lock between the lock arm on the side of the seat body and the fixed anchor is released in association with the storage of the child seat, so that complicated operation of the seat body during tumble is surely prevented. To be done.

[0012]

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

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

The (built-in) child seat 16 is
For example, it is formed with a combination of a child seat cushion (child cushion) 18 and a child seat back (child back) 20, and the child back is swingable 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 seated as shown in FIG. 3 under the flip-up operation around the hinge pin 14 from the use position shown in FIG. A child back 20 can be stored together with a main body, for example, a storage recess 24a formed in the seat back 24 of the rear seat 22.

Incidentally, such a child seat 16 is
For example, the child bag 20 in the use position shown in FIG.
When the seat is seated on the rear seat (seat main body) 22, the armrest can be used also as a seat occupant (see the chain double-dashed line in FIG. 1).

As shown in FIGS. 1 and 2, a cushion frame 18a, which forms the skeleton of the child cushion 18, is formed, for example, by having brackets 26 with hinge pins 14 projectingly provided on the left and right sides of the rear end thereof. , Seat back
A child cushion is swingably attached to the seat back by pivotal support of hinge pins in a pair of base brackets 28 fixed to 24.

Then, for example, each end of the support rod 30 which is 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 the bracket 26 at the extension end. A child bag is swingably connected to and supported by the child cushion 18. Usually, the support rod 30 is pivotally supported at a position separated from the hinge pin 14 by a specific distance.

As can be seen from FIG. 2,
In the present invention, attention is paid to the fact that the support rod 30 is disposed apart from the hinge pin 14 by a predetermined distance, and each extended end of the support rod is formed as a support pin 12 by further extending and forming each end of the support rod. Is forming.

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

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

Here, in the present invention, the extending 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. There is. As you can see from Figure 1,
The extending piece 38b extends in the direction of being located on the movement trajectory of the support pin 12 when the hook 38a and the anchor 36 are locked (engaged).

Then, as shown in FIGS. 1 and 2, the lock arm 38 is held at the lock position under the engagement of the extending piece 38b with the locking pin 42 projecting from the base bracket 28. Has been done.

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 38 can be biased in the lock direction.
A tension coil spring stretched between the lower ends of 28 can be used.

In the built-in child seat locking mechanism 10 having such a structure, 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 (tensile coil spring) 44. It is locked against.

In such a state, the forward tilting of the seat back 24 with respect to the seat cushion 46 is restricted by 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 front load acts on the child seat in an emergency such as a sudden stop, the load is still applied to the lock arm 38 and the anchor. Since it escapes directly to the body 34 of the automobile via the vehicle, it does not adversely affect the rear seat 22, that is, the seat body. That is, the seat body 22 includes the hook 38a and the anchor.
It is held in its normal use position with a sufficiently high holding force under the lock between 36.

When at least the child cushion 18 is flipped up from such an initial position, that is, the use position of the child seat 16, the support pin 12 becomes a hinge pin.
With the center of 14, the inside of the guide hole 32 is moved toward the lower end shown by the solid arrow in FIG.

Since the extension piece 38b of the lock arm is located on the moving path of the support pin 12, the guide hole 32b
Under the movement of the support pin towards the lower end along
The support pin first engages the extension piece. Then, when the child cushion 18 is further swung in the retracting direction from this state, the support pin 12 moves while pressing the extending piece 38b in the traveling direction thereof, so that the biasing force of the return spring 44 is resisted. Rotation of the lock arm 38 in the counterclockwise direction releases the lock between the hook 38a and the anchor 36 (see FIG. 3).

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

Then, if the seat cushion 46 is flipped up around the hinge (not shown) at the front end from the state where the seat back 24 is tilted forward, the seat 22 having the child seat 16 attached thereto, that is, the folding (tumbling) of the seat body. Is possible.

That is, in the lock mechanism 10 for the built-in child seat according to the present invention, the child seat
It is possible to tumble the seat 22 in synchronization with the storing operation of 16.

Further, as shown in FIG. 3, when the seat 22 is returned to the normal seated state and the child seat 16 is pulled out in this state, the support pin 12 centering on the hinge pin 14 is provided.
By the movement of, the pressing of the extension piece 38b by the support pin is released. Then, as shown in FIG. 1, the return spring 44
Under such biasing force, the hook 38a of the lock arm and the anchor 36 are re-locked to set and hold the seat back 24, that is, the seat 22 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) and is used in
By locking at the storage position, the child seat is set and held at each position.

As described above, in the lock mechanism 10 for the built-in child seat according to the present invention, the hook 38b of the lock arm interlocks with the storage of the child seat 16.
, The lock between the body anchors 36, ie the body 34
The seat 22 is automatically unlocked with respect to. In other words, the seat 22 that is different from the storage operation of the child seat 16
Since the seat can be tumbled only by the retracting operation of the child seat 16 without performing the unlocking operation for, the operability during tumble is surely improved.

Since the lock arm 38 is directly rotated in the unlocking direction under the retracting operation of the child seat 16, a linking 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 the resulting complication of the configuration.

Further, when used as a child seat or armrest, the hook 38a and the anchor 36 are not unlocked, so that the safety and comfort of the seated person on the seat 22 and the infant seated on the child seat 16 are sufficient. Can be secured.

Since the support pin 12 parallel to the hinge pin 14 is projected from the bracket 26 and the extension piece 38b of the lock arm is arranged on the movement locus of the support pin, the structure 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 is applied to the lock arm 38 and the anchor. Since it is directly released to the body 34 of the automobile through the, the holding force for the seat body can be secured sufficiently high. for that reason,
According to the present invention, the child seat 16 and the REIT main body 22.
Even if the locking mechanism is integrated, the holding force for the child seat and the seat body does not decrease.

Further, according to 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, the lock arm 38 is projected from the floor surface when the seat 22 is tumbled. The only member is the anchor. That is, the floor surface 34 can be effectively used easily when the seat body 22 is tumbled.

Here, in the embodiment, the return spring
The tension coil spring is illustrated as 44, but the hook 38a
It suffices if the lock arm 38 is biased in the locking direction of the anchor 36 according to the present invention. Good.

If the return spring 44 is a tension coil spring, it does not require a large space for mounting and arranging, and it suffices to directly lock each terminal to the lock arm 38 and the base bracket 28. It is possible to reliably prevent the configuration from becoming complicated and the work from becoming complicated.

Here, in the structure using the 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. Then, each end of the torsion spring (return spring) 44 is locked to the lock arm 38 and the base bracket 28 which is a base member to which the lock arm is attached, and a biasing force in the lock direction is applied to the lock arm. .

As described above, if the return spring 44 is a torsion spring, the work can be simplified and the outward protrusion of the lock arm 38 can be sufficiently suppressed. Therefore, the space required for the return spring can be saved. It will become even more popular.

The return spring 44, which is a tension coil spring, is sufficient if the lock arm 38 is biased in the locking direction between the hook 38a and the anchor 36. Therefore, the tension position is not limited to the illustrated position.

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 it projects parallel to the hinge pin at a position apart from the hinge pin 14. The present invention is not limited to this, and for example, as shown in FIG. 5, a support pin separate from the support rod may be provided on the bracket 26 so as to project.

However, if the end (extended end) of the support rod 30 is used as the support pin 12, the number of parts can be reduced, so that the increase in the number of parts and the complication of the configuration due to this can be surely achieved. To be prevented.

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

However, the support pin is provided in the guide hole 32.
In the configuration in which 12 is loosely inserted, excessive swinging of the child seat 16 from the use position and the storage position is restricted under the engagement of each end edge of the guide hole and the support pin, so that another member such as a stopper is provided. The swing of the child seat can be regulated without the provision of. Therefore, also in this respect, an increase in the number of parts can be prevented, and the configuration of the child seat locking mechanism 10 can be sufficiently simplified.

As in the embodiment, 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, it is necessary to dispose a dedicated bracket for these as separate members. Therefore, from this point as well, the configuration can be simplified.

Further, in the embodiment, the anchor 36 is directly fixed to the floor surface 34, but since it is sufficient if the anchor is fixed to the floor surface, it is not limited to the direct fixing. By indirect fixing via other members,
The anchor may be attached to the floor surface.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0053]

As described above, according to the lock mechanism for a built-in 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 association with the storage of the child seat. Therefore, the seat body can be tumbled without performing an unlocking operation for the seat body. Therefore, the operability during tumble of the seat body is surely improved.

Further, since the lock arm is directly rotated in the unlocking direction under the operation of storing the child seat, a connecting member which is a separate member such as a link or a cable is not required. Therefore, the number of parts increases, and
It is possible to reliably prevent the complication of the configuration due to it.

Further, since it is sufficient to project the support pin in parallel with the hinge pin and to extend and dispose the extension piece of the lock arm on the movement locus of the support pin, the structure is not complicated.

In the structure in which the support pin is loosely inserted in the guide hole, excessive swinging of the child seat from the use position and the storage position is restricted under the engagement of each end edge of the guide hole and the support pin. Therefore, the swinging 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 parts can be prevented, and the structure of the child seat locking mechanism can be sufficiently simplified.

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

Further, if the extended end of the support rod is used as the support pin, the number of parts can be reduced, so that the increase in the number of parts and the complication of the configuration due to this can be reliably prevented.

Further, if the return spring is a tension coil spring, a very wide space is not 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 this is sufficient, it is possible to reliably prevent the configuration from becoming complicated and the work from becoming complicated.

Further, if a torsion spring is used as the return spring, the work can be simplified and the outward protrusion of the lock arm can be sufficiently suppressed. It comes off.

[Brief description of drawings]

FIG. 1 is a schematic front view of a lock mechanism of a built-in 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 the lock mechanism of the built-in child seat according to the present invention in the 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 Recessing recess 28 Base bracket (base member to be attached) 30 Support rod 32 Guide hole 36 Anchor 38 Lock arm 38a Hook 38b Extending piece 44 Return spring

Claims (6)

[Claims] 1. A child seat cushion having a child seat back that can be tilted forward is connected to and supported by a storage recess of a seat body via a hinge so as to be retractable.
In a built-in child seat that also functions as an armrest that can be used as an armrest for the seat occupant by tilting the child seat back forward in the position where the child seat cushion is used, the support pin is separated from the hinge pin by a certain distance. The lock arm, which is provided in parallel with the hinge pin and has at one end a hook that can engage with an anchor fixed to the floor, is rotatably supported with respect to the base member to be attached. The extension piece of the arm extends along the trajectory of the support pin, and the extension of the support pin accompanying the retracting 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 anchor. A building toy that can be unlocked between the hook and anchor by pressing one side The lock mechanism of the formula child seat. 2. A child seat cushion having a child seat back that can be tilted forward is connected to and supported by a storage recess of a seat body via a hinge so as to be retractable.
In a built-in child seat that also functions as an armrest that can be used as an armrest for the seat occupant by tilting the child seat back forward in the position where the child seat cushion is used, the support pin is separated from the hinge pin by a certain distance. , A guide hole with a width that allows the support pin to be loosely inserted in an arc shape with the distance between the hinge pin and the support pin as the radius around the hinge pin is provided as a fixed base on which the hinge is pivotally supported. A lock arm, which is formed on the bracket and has a hook at one end that can engage with a fixed anchor, is rotatably supported by the base bracket, and the extension piece of the lock arm extends on the movement path of the support pin. Bias the lock arm in the locking 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 lock mechanism for a built-in child seat according to claim 1, wherein an end of a support rod for supporting the child seat back so as to be able to be tilted 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 which can be tilted forward is connected to and supported by a storage recess of a seat body via a hinge so as to be retractable.
With the built-in child seat that can also be used as an armrest for the seat occupant while the child seat cushion is moved forward in the position where the child seat cushion is used, the child seat back is supported so that it can be moved forward with respect to the child seat cushion. The end of the supporting rod is extended by a predetermined length to form a support pin, and a guide hole with a width that allows loose insertion of the support pin is formed around the hinge pin with a radius between the hinge pin and the support pin. , A lock arm which is formed on a fixed base bracket pivotally supported by a hinge and which has at one end a hook engageable with an anchor fixed to a floor surface,
It is rotatably supported by the base bracket, and the extended end of the lock arm is extended on the movement locus of the support pin to resist 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 child seat locking mechanism that allows the hook and anchor to be unlocked by pressing the extension end with the support pin when the child seat is stored. 5. 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 locking direction. The lock mechanism for the built-in child seat according to any one of the above. 6. A return spring enables biasing of the lock arm in the locking direction, and each terminal is engaged with the lock arm and a target base member of the lock arm and wound around a support pin of the lock arm. The lock mechanism for a built-in child seat according to any one of claims 1 to 4, which is a torsion spring.