JP7094819B2 - ISOFIX child seat - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is an ISOFIX child seat having a shrink lock mechanism capable of securely locking the lock portion to the vehicle mounting receiver without the lock arm moving in the retracting direction when the lock portion is locked to the vehicle mounting receiving portion. Regarding.

ISOFIX is an international standard for fixing a child seat on a vehicle seat. This ISOFIX can safely and securely attach a child seat and a vehicle seat with special metal fittings. In recent years, new cars are obliged to be equipped with ISOFIX mounting brackets.

FIG. 9 is an explanatory diagram for attaching a conventional ISOFIX child seat to a vehicle seat. FIG. 10 is a perspective view of a main part of a conventional ISOFIX child seat. The ISOFIX child seat 10 having a conventional ISOFIX fixed structure is a base body in which a pair of left and right lock arms 20 can be moved in the front-rear direction by a pair of left and right arm guides 21 arranged at the bottom position of the base body 14. It is held inside the 14 and further, a control mechanism 40 for controlling the expansion and contraction operation of the pair of left and right lock arms 20 is arranged in the base body 14.
The control mechanism 40 includes a control mechanism link member 43 that moves in the front-rear direction by operating a pair of left and right arm guide operation units 42, a spring 44 that applies the control mechanism link member 43 to the rear, and a tip position of the control mechanism link member 43. It is provided with a stopper guide 45 connected to the above.
A lock portion 30 is arranged at the tip of the lock arm 20. The lock portion 30 has a hook 31 having a receiving port formed at one end thereof for receiving the mounting receiving portion 4 of the vehicle. The hook 31 is rotated by a shaft portion arranged between the left and right side walls of the lock arm 20, and is in a non-locked state in which the inlet is opened rearward and in a locked state in which the inlet is closed by the lower surface of the lock arm 20. It is pivotally supported so that it can be switched.

Further, a shrinkage lock mechanism 60 that operates in conjunction with the disengagement of the lock portion 30 is provided. FIG. 11 is an explanatory diagram 1 of a conventional shrink lock mechanism. FIG. 12 is an explanatory diagram 2 of a conventional shrink lock mechanism. FIG. 13 is an explanatory diagram 3 of a conventional shrink lock mechanism. FIG. 14 is an explanatory diagram 4 of a conventional shrink lock mechanism. The contraction lock mechanism 60 is formed on a lock piece 61 having a protrusion 611 capable of projecting from the lock arm 20 at a position where the lock arm 20 is in the attachment / detachment control range, and a lock bar 34 formed on the lock bar 34 so that the front position is low and the rear position is high. It has a lock guide portion 62 having a guide surface 621 formed of an inclined surface. Further, the lock piece 61 has a guide shaft 612 formed so as to project in the left-right (thickness) direction, and one of the left and right guide shafts 612 is supported in an elongated hole 202 formed in the vertical direction on the side surface of the lock arm 20. By doing so, the movement of the lock piece 61 is restricted in the vertical direction. Further, when either the left or right guide shaft 612 comes into contact with the guide surface 621 of the lock guide portion 62, the vertical position of the lock piece 61 is controlled by the position of the guide surface 621. A hole 203 is formed at a position facing the protrusion 611 of the lock piece 61 of the lock arm 20 so that the protrusion 611 can protrude.

With such a configuration, when the lock portion 30 is in the unlocked state, the lock bar 34 is in the position where the lock bar 34 is moved forward. Therefore, the protruding portion 611 of the lock piece 61 protrudes above the lock arm 20 to prohibit the movement of the lock arm 20. (See FIGS. 11 and 12).
On the other hand, when the lock portion 30 is in the locked state, the lock bar 34 is moved to the rear position, the guide shaft 612 of the lock piece 61 is set to a low position, and the protruding portion 611 is held and locked at a position where it does not protrude from the lock arm 20. The arm 20 can be moved (see FIGS. 13 and 14). As a result, the lock portion 30 can be reliably locked to the mounting receiving portion 4 of the vehicle.

When such a child seat 10 is mounted on a vehicle seat, if the hook of the lock portion 30 engages with the mounting receiving portion 4 while the end portion of the arm guide 21 is not in contact with the protruding portion 611, the child seat 10 protrudes. The portion 611 descends smoothly so that the arm guide 21 can move.
However, in reality, when the user mounts the child seat body on the seat side, the child seat body is pushed toward the seat side (load is applied), so that when the hook engages with the mounting receiving portion 4, the tip and the protruding portion of the arm guide 21 611 are in contact (see FIG. 11). When this contact (friction force) is larger than the downward force of the protruding portion 611, the tip of the arm guide 21 hinders the lowering of the protruding portion 611 (arrow A in FIG. 11), in other words, of the arm guide 21. The tip is caught on the protrusion 611 and the hook 31 does not engage. Alternatively, even if they are engaged, a phenomenon has occurred in which the lock arm 20 is not in a movable state.

Japanese Patent No. 5814672

An object to be solved by the present invention is to provide an ISOFIX child seat that can be safely and securely mounted without any trouble at the time of seat mounting in view of the above-mentioned problems of the prior art.

The present invention is an ISOFIX child seat provided with a shrink lock mechanism that prevents the arm guide from moving in conjunction with the release of the seat mounting receiving portion and the locking portion as a first means for solving the above problems.
The contraction lock mechanism is provided with a lock piece having a protrusion at the tip that contacts or does not contact the end of the arm guide, and an opening formed in the lock bar of the lock and through which the protrusion penetrates. Equipped with a support recess to accommodate
The protruding portion protrudes from the opening on the moving side of the arm guide when the locked portion is unlocked to prevent the arm guide from moving, and moves from the end portion of the arm guide when the locked portion is locked. It is an object of the present invention to provide an ISOFIX child seat, which is characterized in that it rotates forward and the arm guide is movably fitted in the support recess.
According to the first means, since the contraction lock mechanism is released in the rotational direction, the protrusion of the contraction lock mechanism can be opened so as to fall from the end of the arm guide to the moving side when the lock arm is latched. Therefore, the arm guide does not get caught in the protrusion. In addition, the impact of contact between the protrusion and the end of the arm guide is alleviated, and damage to the components can be prevented.

According to the present invention, as a second means for solving the above-mentioned problems, in the first means, the lock piece is provided with a protrusion at one end and a guide shaft at the other end, and the arm guide of the protrusion. It is an object of the present invention to provide an ISOFIX child seat characterized by having a curved portion curved to a side rotating from an end portion to a moving side and a sheared portion continuous with the curved portion.
According to the second means, when the lock piece moves in the support recess due to the configuration of the curved portion, it is possible to smoothly perform rotational movement of upright or tilting. Further, depending on the configuration of the sheared portion, a shearing force can be applied to the force in the moving direction of the arm guide.

According to the present invention, as a third means for solving the above-mentioned problems, in the second means, the support recess supports the guide shaft and has a long hole along the moving direction of the arm guide and the protrusion. An ISOFIX child seat comprising a shear receiving portion that comes into contact with the sheared portion when the portion protrudes from the opening, and a guide portion that assists rotation when the protruding portion fits into the support recess from the opening. Is to provide.
According to the third means, when the locked portion is in the unlocked state, it is possible to support the upright state of the locked piece and apply a shearing force that can withstand the force in the moving direction of the arm guide. Further, the configuration of the guide portion can assist the rotation when the lock piece is erected or tilted, and it is not necessary to newly provide a drive source.

According to the present invention, as a fourth means for solving the above problems, in any one of the first to third means, the protruding portion comes into contact with the arm guide when the locked portion is in the unlocked state. It is an object of the present invention to provide an ISOFIX child seat characterized in that the tip is formed in a tapered shape.
According to the fourth means, it is possible to prevent the tip from being damaged in contact with the arm guide.

According to the present invention, since the contraction lock mechanism is released in the rotation direction, the protrusion of the contraction lock mechanism can be opened so as to fall from the end of the arm guide to the moving side when the lock arm is latched. Therefore, there is no problem of sliding due to friction as in the case of the conventional vertical movement of the protruding portion. Further, such a structure can alleviate the impact of contact between the protrusion and the end of the arm guide and prevent damage to the components.

It is a side sectional view of the shrink lock mechanism in the unlocked state. It is a side sectional view of the shrink lock mechanism in the locked state. It is a side view of the lock arm in the unlocked state. FIG. 1 is an explanatory view of the operation of the ISOFIX child seat of the present invention. FIG. 2 is an explanatory view of the operation of the ISOFIX child seat of the present invention. FIG. 3 is an explanatory view of the operation of the ISOFIX child seat of the present invention. FIG. 4 is an explanatory view of the operation of the ISOFIX child seat of the present invention. FIG. 5 is an explanatory view of the operation of the ISOFIX child seat of the present invention. It is explanatory drawing which attaches the conventional ISOFIX child seat to the seat of a vehicle. It is a perspective view of the main part of the conventional ISOFIX child seat. It is explanatory drawing 1 of the conventional shrink lock mechanism. It is explanatory drawing 2 of the conventional shrink lock mechanism. It is explanatory drawing 3 of the conventional shrink lock mechanism. It is explanatory drawing 4 of the conventional shrink lock mechanism.

An embodiment of the ISOFIX child seat of the present invention will be described in detail below with reference to the drawings. In the present embodiment, the front-rear direction and the left-right direction correspond to the front-rear direction and the left-right direction for a person seated in the seat of the vehicle in which the child seat is installed.
FIG. 1 is a side sectional view of the shrink lock mechanism in the unlocked state. FIG. 2 is a side sectional view of the shrink lock mechanism in the locked state. FIG. 3 is a side view of the lock arm in the unlocked state.
As shown in the figure, the shrink lock mechanism 100 of the ISOFIX child seat of the present invention is formed on a lock piece 120 having a protrusion 122 at the tip that contacts or does not contact the end of the arm guide 21, and a lock bar 34 of the lock portion 30. It is composed of a support recess 130 for accommodating the lock piece 120 by providing an opening 132 through which the protrusion 122 penetrates.

The lock piece 120 is provided with a protrusion 122 on one end side and a guide shaft 124 on the other end side. The protrusion 122 has a substantially flat surface on the arm guide 21 side and a curved surface on the lock portion 30 side, and is formed in a wedge shape when viewed from the side.
Further, the lock piece 120 includes a curved portion 126 that is curved to the side that rotates from the end of the arm guide 21 of the protruding portion 122 to the moving side, and a planar shear portion 128 that is continuous with the curved portion 126. With such a configuration of the curved portion 126, when the lock piece 120 moves in the support recess 130 described later, it is possible to smoothly perform rotational movement of upright or tilting. Further, by configuring the shearing portion 128, a shearing force can be applied to the force in the moving direction of the arm guide 21.
The protruding portion 122 is formed in a tapered shape having a rounded tip shape. This makes it possible to prevent the tip from being damaged in contact with the arm guide 21.
The guide shaft 124 is a shaft protruding in the thickness direction from both side surfaces of the lock piece 120, penetrates the elongated hole 134 of the support recess 130 described later, and is rotatably supported by the lock arm 20 (FIG. 1). , 3).

The support recess 130 is a recess formed in the lock bar 34 of the lock portion 30 and provided with an opening 132 through which the protrusion 122 penetrates to accommodate the lock piece 120.
The support recess 130 penetrates and supports the guide shaft 124, and has an elongated hole 134 along the moving direction of the arm guide 21 and a shear receiving portion 136 that comes into contact with the shear portion 128 when the protruding portion 122 protrudes from the opening 132. And, the guide portion 138 that assists the rotation when the protrusion 122 fits into the support recess 130 from the opening 132 is provided.
The opening 132 is a hole provided at a position where the lock piece 120 in the support recess 130 stands up and the protrusion 122 protrudes from the support recess 130.
The elongated hole 134 is a hole through which the guide shaft 124 penetrates and supports, and is formed in the longitudinal direction along the moving direction of the arm guide 21.

The shear receiving portion 136 is provided on a surface facing the shearing portion 128 when the lock piece 120 stands up in the support recess 130. The shear receiving portion 136 is formed along a direction orthogonal to the moving direction of the arm guide 21.
The guide portion 138 is a slope that comes into contact with the surface of the lock piece 120 on the arm guide 21 side to assist the rotation of the lock piece 120 from the upright state to the inclined state. With such a configuration of the guide portion 138, when the lock portion 30 is in the locked state, the standing lock piece 120 is moved in the moving direction of the arm guide 21 in conjunction with the movement of the lock bar 34 toward the hook 31 side. It is possible to guide the guide shaft 124 to an inclined state while rotating the guide shaft 124 toward the front side.

The operation of the ISOFIX child seat of the present invention with such a configuration will be described below.
FIG. 4 is an explanatory diagram 1 of the operation of the ISOFIX child seat of the present invention. FIG. 5 is an explanatory diagram 2 of the operation of the ISOFIX child seat of the present invention. FIG. 6 is an explanatory diagram 3 of the operation of the ISOFIX child seat of the present invention. FIG. 7 is an explanatory diagram 4 of the operation of the ISOFIX child seat of the present invention. FIG. 8 is an explanatory diagram 5 of the operation of the ISOFIX child seat of the present invention.

When the lock arm 20 is assembled to the arm guide 21 and the lock portion 30 is in the unlocked (released) state, the lock bar 34 is located on the arm guide 21 side, and the lock piece 120 in the support recess 130 is in the upright state. The protruding portion 122 protrudes from the opening 132 of the support recess 130 to suppress the movement of the arm guide 21 (see FIG. 1). The lock arm 20 does not move (does not shrink) even if the shearing force of the lock bar 34 and the arm guide 21 acts on the protruding portion 122. At this time, the guide shaft 124 of the lock piece is located on the lock portion 30 side of the elongated hole 134 of the support recess 130, and the shear portion 128 of the lock piece 120 and the shear receiving portion 136 of the support recess 130 are in surface contact with each other and the lock arm 20. Is giving a shearing force in the direction of movement.

Next, when the lock portion 30 is locked to the mounting receiving portion 4 and is in the locked state, the hook 31 rotates and the lock bar 34 is inserted into the hook 31. At the same time, the lock bar 34 rotates the lock piece 120, and the protruding portion 122 tilts forward in the moving direction of the arm guide 21 so that it fits into the support recess 130 from the opening 132 and inclines (see FIG. 2).
When the ISOFIX child seat is moved to the seat side so as to eliminate the gap between the ISOFIX child seat and the seat after the lock portion 30 is locked, the lock arm 20 is moved to the first latch position, and the claw 72 of the latch bar 70 is the lock arm. Locks to the opening 204 of 20 (see FIG. 4).

The latch position can be arbitrarily adjusted, and when the lock arm 20 is further moved, the lock piece 120 enters the arm guide 21 (see FIG. 5). The above is the operation for mounting the ISOFIX child seat.
Next, when releasing the ISOFIX child seat, the release lever 80 is operated to pull up the latch bar 70, and the claw 72 is removed from the opening 204. When the ISOFIX child seat 10 is pulled out from the seat while operating the release lever 80, the arm guide 21 also moves in the direction away from the lock portion 30. At this time, since the lock portion 30 is locked to the mounting receiving portion 4, the lock arm 20 is also pulled out (extended) from the arm guide 21 at the same position (see FIG. 6).
When the arm guide 21 is moved away from the seat, the release lever 80 comes into contact with the protrusion 341 of the lock bar 34 (see FIG. 7).
Further pulling the arm guide 21 causes the release lever 80 to move the lock bar 34 away from the seat, the tip of the lock bar 34 is pulled out from the hook 31, the hook 31 rotates, and the mounting receiving portion 4 is released. Can be removed (see FIG. 8).

[Modification example]
The lock piece 120 of the shrinkage lock mechanism 100 has been described with a configuration in which it protrudes from the upper surface of the lock arm 20 having a rectangular cross section. It is also possible to adopt a configuration in which the protruding portion 122 protrudes from any surface of the lower surface.
According to the ISOFIX child seat of the present invention, since the shrink lock mechanism is opened in the rotational direction, the protrusion of the shrink lock mechanism can be opened so as to fall from the end of the arm guide to the moving side when the lock arm is latched. .. Therefore, there is no problem of sliding due to friction as in the conventional vertical movement. Further, such a structure can alleviate the impact of contact between the protrusion and the end of the arm guide and prevent damage to the components.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
Further, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

The present invention can be widely applied, for example, as an in-vehicle child seat equipped with ISOFIX in the seat.

4 Mounting receiving part 10 ISOFIX child sheet 100 Shrinkage lock mechanism 120 Lock piece 122 Protruding part 124 Guide shaft 126 Curved part 128 Shear part 130 Support recess 132 Opening 134 Long hole 136 Shear receiving part 138 Guide part 14 Base body 20 Lock arm 203 Hole 204 Opening 21 Arm guide 30 Lock part 31 Hook 34 Lock bar 341 Protrusion 40 Control mechanism 42 Arm guide operation part 43 Control mechanism Link member 44 Spring 45 Stopper guide 60 Shrinkage lock mechanism 61 Lock piece 611 Projection part 612 Guide shaft 62 Lock guide part 621 Guide surface 70 Latch bar 72 Claw 80 Release lever

Claims (4)

In an ISOFIX child seat equipped with a shrink lock mechanism that prevents the arm guide from moving in conjunction with the release of the seat mounting receiving part and the locking part.
The contraction lock mechanism is provided with a lock piece having a protrusion at the tip that contacts or does not contact the end of the arm guide, and an opening formed in the lock bar of the lock and through which the protrusion penetrates. Equipped with a support recess to accommodate
The protruding portion protrudes from the opening on the moving side of the arm guide when the locked portion is unlocked to prevent the arm guide from moving, and moves from the end portion of the arm guide when the locked portion is locked. An ISOFIX child seat that rotates forward and the arm guide is movably housed in the support recess. The ISOFIX child seat according to claim 1.
The lock piece is provided with the projecting portion at one end and a guide shaft at the other end, and is continuous with the curved portion curved to the side that rotates from the end portion of the arm guide to the moving side of the projecting portion. An ISOFIX child seat characterized by having a flat shear portion. The ISOFIX child seat according to claim 2.
The support recesses support the guide shaft and have an elongated hole along the moving direction of the arm guide, a shear receiving portion that comes into contact with the sheared portion when the protruding portion protrudes from the opening, and the protruding portion. An ISOFIX child seat comprising a guide portion that assists rotation when the seat is fitted into the support recess from the opening. The ISOFIX child seat according to any one of claims 1 to 3.
The ISOFIX child seat is characterized in that the protruding portion has a tapered tip that comes into contact with the arm guide when the locked portion is in the unlocked state.

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