JP2020019338A - ISOFIX child seat - Google Patents

Abstract

To provide an ISOFIX child seat which can be safely and reliably fitted by eliminating problems when installing a seat.SOLUTION: An ISOFIX child seat comprising a shrink lock mechanism 100 which prevents movement of an arm guide 21 in linkage with release of a mounting bracket 4 and a lock part 30 of a seat. In the child seat, the shrink lock mechanism 100 comprises: a lock piece 120 having, at a tip thereof, a projection 122 which is in contact or is not contact with an end of the arm guide 21; and a support recess 130 which is formed in a lock bar 34, is provided with an opening 132 through which the projection 122 penetrates, and accommodates the lock piece 120. The projection 122 projects from the opening 132 on a movement side of the arm guide 21 to prevent movement of the guide arm 21 when the lock part 30 is in a non-lock state, and is rotated to the movement forward side from the end of the arm guide 21 when the lock part 30 is in a lock state, and the arm guide 21 is movably accommodated in the support recess 130.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ISOFIX child seat having a contraction lock mechanism capable of securely locking a lock portion to a mounting receiving portion of a vehicle without a lock arm moving in a storage direction when the locking portion is locked to the mounting receiving portion of the vehicle. About.

  ISOFIX is an international standard for fixing a child seat on a vehicle seat. In this ISOFIX, a child seat and a vehicle seat can be securely and securely attached with a dedicated bracket. In recent years, the installation of ISOFIX mounting brackets is mandatory for new vehicles.

FIG. 9 is an explanatory view 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 fixing structure is configured such that 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 disposed at the bottom of the base body 14. A control mechanism 40 that is held inside the base 14 and that controls the expansion and contraction of the pair of left and right lock arms 20 is disposed inside 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 sections 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. And a stopper guide 45 connected with the stopper guide 45.
A lock portion 30 is arranged at the tip of the lock arm 20. The lock portion 30 has a hook 31 formed at one end with a receiving opening capable of 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 a non-locked state in which the receiving port is opened rearward, and a locked state in which the receiving port is closed by the lower surface of the lock arm 20. It is supported so that it can be switched.

  Further, a contraction lock mechanism 60 that operates in conjunction with the release of the engagement of the lock portion 30 is provided. FIG. 11 is an explanatory view 1 of a conventional compression lock mechanism. FIG. 12 is an explanatory view 2 of a conventional compression lock mechanism. FIG. 13 is an explanatory view 3 of a conventional compression lock mechanism. FIG. 14 is an explanatory view 4 of a conventional compression lock mechanism. The contraction lock mechanism 60 includes a lock piece 61 having a protruding portion 611 that allows the lock arm 20 to protrude from the lock arm 20 at a position in the attachment / detachment control range, and a lock bar 34 having a lower front position and a higher rear position. 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 protrude in the left-right (thickness) direction, and one of the right and left guide shafts 612 is supported in an elongated hole 202 formed in the side surface of the lock arm 20 in the up-down direction. As a result, the movement of the lock piece 61 is restricted in the vertical direction. In addition, when the other one of the left and right guide shafts 612 abuts on 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 through which the protrusion 611 can protrude is formed at a position of the lock arm 20 facing the protrusion 611 of the lock piece 61.

With such a configuration, when the lock portion 30 is in the unlocked state, the lock bar 34 is at a position where the lock bar 34 has moved forward, so that 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 rearward position, the guide shaft 612 of the lock piece 61 is at a low position, and the protrusion 611 is held at a position where it does not protrude from the lock arm 20 to lock. The arm 20 can be moved (see FIGS. 13 and 14). Thereby, the lock portion 30 can be securely locked to the attachment 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 is engaged with the attachment receiving portion 4 in a state where the end of the arm guide 21 is not in contact with the protruding portion 611, the The part 611 descends smoothly and the arm guide 21 becomes movable.
However, in actuality, when the user attaches the child seat body to the seat side, the child seat body is pushed into the seat side (load is applied). 611 are in contact (see FIG. 11). If this contact (frictional force) is greater than the force with which the protruding portion 611 descends, the tip of the arm guide 21 prevents the lowering of the protruding portion 611 (arrow A in FIG. 11). The tip is hooked on the protrusion 611, and the hook 31 is not engaged. Alternatively, a phenomenon has occurred in which the lock arm 20 does not enter a movable state even when the lock arm 20 is engaged.

Japanese Patent No. 5814672

  An object of the present invention is to provide an ISOFIX child seat that can be mounted safely and securely without the problem of mounting the seat, in view of the problems of the related art.

According to a first aspect of the present invention, there is provided an ISOFIX child seat provided with a contraction lock mechanism for preventing movement of an arm guide in conjunction with release of a seat receiving portion and a lock portion.
The contraction lock mechanism includes a lock piece having a protrusion at a tip thereof that comes into contact with or does not contact an end of the arm guide, and an opening formed in a lock bar of the lock section and through which the protrusion passes. A supporting recess for accommodating the
The projecting portion projects from the opening on the moving side of the arm guide when the lock portion is in the unlocked state and prevents movement of the arm guide, and moves from the end of the arm guide when the lock portion is in the locked state. It is an object of the present invention to provide an ISOFIX child seat that rotates forward and the arm guide is movably accommodated in the support recess.
According to the first means, since the contraction lock mechanism is opened in the rotation direction, the protrusion of the contraction lock mechanism can be opened from the end of the arm guide toward the moving side when the lock arm is latched. Therefore, the arm guide does not catch on the protruding portion. In addition, the impact of the contact between the protruding portion and the end of the arm guide is reduced, and damage to the components can be prevented.

According to a second aspect of the present invention, in the first aspect, the lock piece includes the projecting portion at one end and a guide shaft at the other end, and the arm guide of the projecting portion is provided. The present invention provides an ISOFIX child seat, comprising: a curved portion curved from the end portion to the side rotating toward the moving side; and a shearing portion continuous to 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 the upright or inclined rotational movement. In addition, a shear force with respect to the force in the moving direction of the arm guide can be provided by the configuration of the shear portion.

According to a third aspect of the present invention, in the second aspect, in the second aspect, the support recess supports the guide shaft and has an elongated hole along a moving direction of the arm guide; An ISOFIX child seat, comprising: a shear receiving portion that comes into contact with the shear 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 lock portion is in the unlocked state, the lock piece can be supported in the upright state, and a shearing force that can withstand the force in the moving direction of the arm guide can be applied. In addition, the configuration of the guide portion can assist the rotation when the lock piece is raised or inclined, and it is not necessary to newly provide a drive source.

According to a fourth aspect of the present invention, as set forth in any one of the first to third aspects, the protrusion contacts the arm guide when the lock portion is in an unlocked state. An object of the present invention is to provide an ISOFIX child seat having a tapered tip.
According to the fourth means, it is possible to prevent the distal end from being damaged by contact with the arm guide.

  According to the present invention, since the release of the contraction lock mechanism is 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 toward the moving side when the lock arm is latched. For this reason, there is no problem of sliding due to friction such as the vertical movement of the conventional projection. Further, with such a structure, the impact of the contact between the projecting portion and the end of the arm guide is reduced, and damage to the components can be prevented.

It is a side sectional view of a contraction lock mechanism at the time of an unlocking state. It is a side sectional view of a contraction lock mechanism at the time of a lock state. It is a side view of the lock arm at the time of an unlocked state. 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 a diagram illustrating 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 operation | movement explanatory drawing 5 of the ISOFIX child seat of this 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 principal part of the conventional ISOFIX child seat. It is explanatory drawing 1 of the conventional compression lock mechanism. It is explanatory drawing 2 of the conventional compression lock mechanism. It is explanatory drawing 3 of the conventional contraction lock mechanism. It is explanatory drawing 4 of the conventional compression lock mechanism.

An embodiment of an ISOFIX child seat according to the present invention will be described below in detail 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 sitting on a vehicle seat on which the child seat is installed.
FIG. 1 is a side sectional view of the contraction lock mechanism in the unlocked state. FIG. 2 is a side sectional view of the contraction lock mechanism in the locked state. FIG. 3 is a side view of the lock arm in the unlocked state.
As shown in the drawing, the contraction lock mechanism 100 of the ISOFIX child seat of the present invention is formed on a lock piece 120 having a protruding portion 122 at the tip thereof that makes contact with or non-contact with the end of the arm guide 21 and a lock bar 34 of the lock portion 30. An opening 132 through which the protruding portion 122 penetrates is provided, and is constituted by a support concave portion 130 that accommodates the lock piece 120.

The lock piece 120 has a protrusion 122 on one end and a guide shaft 124 on the other end. 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 in a side view.
In addition, the lock piece 120 includes a curved portion 126 that is curved from the end of the arm guide 21 of the protruding portion 122 to the side that moves 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 concave portion 130 described later, a rotational movement in which the lock piece 120 stands upright or tilts smoothly can be performed. The configuration of the shearing portion 128 can apply a shearing force to the force in the moving direction of the arm guide 21.
The protruding portion 122 is formed in a tapered shape with a rounded tip. This can prevent the tip from being damaged by 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 a long hole 134 of a support recess 130 described later, and is rotatably supported by the lock arm 20 (FIG. 1). , 3).

The support concave portion 130 is a concave portion formed in the lock bar 34 of the lock portion 30 and provided with an opening 132 through which the protruding portion 122 penetrates to accommodate the lock piece 120.
The support recess 130 penetrates and supports the guide shaft 124, and has a long 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 projection 122 projects from the opening 132. And a guide portion 138 for assisting rotation when the protrusion 122 is fitted into the support recess 130 from the opening 132.
The opening 132 is a hole provided at a position where the lock piece 120 stands up in the support recess 130 and the protrusion 122 projects from the support recess 130.
The long hole 134 is a hole that the guide shaft 124 penetrates and supports, and has a longitudinal direction formed 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 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 contacts the surface of the lock piece 120 on the arm guide 21 side and assists the rotation of the lock piece 120 from the standing 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 can be guided to the inclined state while rotating around the axis of the guide shaft 124 to the front side.

The operation of the ISOFIX child seat according to the present invention having such a configuration will be described below.
FIG. 4 is a diagram illustrating the operation of the ISOFIX child seat according to the present invention. FIG. 5 is an operation explanatory view 2 of the ISOFIX child seat of the present invention. FIG. 6 is an operation explanatory view 3 of the ISOFIX child seat of the present invention. FIG. 7 is an operation explanatory view 4 of the ISOFIX child seat of the present invention. FIG. 8 is an operation explanatory view 5 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 an upright state. In addition, 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). Even if the shear force of the lock bar 34 and the arm guide 21 acts on the protrusion 122, the lock arm 20 does not move (does not shrink). 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 come into surface contact, and the lock arm 20 Shearing force in the direction of movement.

Next, when the lock portion 30 is locked to the attachment receiving portion 4 to be in a 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 so that the protruding portion 122 falls forward in the moving direction of the arm guide 21, and fits into the support recess 130 from the opening 132 and is inclined (see FIG. 2).
When the ISOFIX child seat is moved toward the seat so as to eliminate the gap between the ISOFIX child seat and the seat after the locking of the lock portion 30, the lock arm 20 moves to the first latch position, and the pawl 72 of the latch bar 70 is moved to the lock arm. 20 is locked in the opening 204 (see FIG. 4).

The position of 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 mounting operation of 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 pawl 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 unit 30. At this time, since the lock portion 30 is locked to the attachment 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 contacts the protrusion 341 of the lock bar 34 (see FIG. 7).
When the arm guide 21 is further pulled, the release lever 80 moves the lock bar 34 in a direction away from the seat, and the tip of the lock bar 34 is pulled out of the hook 31 to rotate the hook 31 to release the mounting receiving portion 4. And can be removed (see FIG. 8).

[Modification]
Although the lock piece 120 of the contraction lock mechanism 100 has been described as a configuration projecting from the upper surface of the lock arm 20 having a rectangular cross section, other configurations of the lock piece 120 include both side faces (left and right side faces) of the lock arm 20, A configuration in which the protruding portion 122 protrudes from any of the lower surfaces may be employed.
According to such an ISOFIX child seat of the present invention, since the opening of the contraction lock mechanism is 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 toward the moving side when the lock arm is latched. . For this reason, there is no problem of sliding due to friction as in the conventional vertical movement. Further, with such a structure, the impact of the contact between the projecting portion and the end of the arm guide is reduced, and damage to the components can be prevented.

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.
In addition, the present invention is not limited to the combinations shown in the embodiments, but can be implemented by various combinations.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied, for example, as an in-vehicle child seat having ISOFIX in a seat.

4 Mounting Receiver 10 ISOFIX Child Seat 100 Shrink Lock Mechanism 120 Locking Piece 122 Projection 124 Guide Shaft 126 Curved Part 128 Shearing Part 130 Supporting Recess 132 Opening 134 Long Hole 136 Shear Reception Part 138 Guide Part 14 Base Body 20 Lock Arm 203 Hole 204 Opening 21 Arm guide 30 Lock section 31 Hook 34 Lock bar 341 Projection 40 Control mechanism 42 Arm guide operating section 43 Control mechanism link member 44 Spring 45 Stopper guide 60 Shrink lock mechanism 61 Lock piece 611 Projection section 612 Guide shaft 62 Lock guide section 621 Guide surface 70 Latch bar 72 Claw 80 Release lever

Claims (4)

In an ISOFIX child seat provided with a contraction lock mechanism for preventing movement of an arm guide in conjunction with release of a seat attachment receiving portion and a lock portion,
The shrinkage lock mechanism includes a lock piece having a protrusion at its tip that comes into contact with or does not contact the end of the arm guide, and an opening formed in a lock bar of the lock section and through which the protrusion passes. A supporting recess for accommodating the
The projecting portion projects from the opening on the moving side of the arm guide when the lock portion is in the unlocked state and prevents movement of the arm guide, and moves from the end of the arm guide when the lock portion is in the locked state. An ISOFIX child seat that rotates forward and the arm guide is movably received in the support recess. The ISOFIX child seat according to claim 1,
The lock piece has the protruding portion at one end and a guide shaft at the other end, and is continuous with the bending portion curved from the end of the arm guide of the protruding portion to the side rotating toward the moving side, and the bending portion. An ISOFIX child seat comprising a flat shear portion. An ISOFIX child seat according to claim 2,
The support recess supports the guide shaft, and has an elongated hole along the moving direction of the arm guide; a shear receiving portion that comes into contact with the shear portion when the projecting portion projects from the opening; and a projecting portion. An ISOFIX child seat, comprising: a guide portion for assisting rotation when the sheet fits into the support recess from the opening. The ISOFIX child seat according to any one of claims 1 to 3, wherein
An ISOFIX child seat, wherein the protruding portion has a tapered tip that comes into contact with the arm guide when the lock portion is in an unlocked state.

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