JP2001080456A5 - Buckle and seatbelt device with it - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention belongs to the technical field of buckles used in safety belt devices such as seat belt devices installed in seats of automobiles and other transportation systems, and seat belt devices equipped with the buckles.

0004
[Problems to be Solved by the Invention]
However, such a conventional buckle requires a spring support member that supports one end of the button spring, so that not only is there a problem that the number of parts is large, but also the number of assembly steps is large and the cost is high. It has become a thing.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a buckle capable of reducing the number of parts as much as possible and further reducing the assembly man-hours and the cost, and a seatbelt device provided with the buckle. Is.

0005
[Means for solving problems]
In order to solve the above-mentioned problems, the buckle of the invention according to claim 1 is rotatably supported between a base having both side walls and a non-engaged position and an engaged position on these side walls. A latch member that is urged toward the engaging position and rotates to the engaging position when the tongue is inserted in a predetermined position to engage with the tongue, and the tongue and the latch member in the engaged state. In a buckle including at least an operating member for dissociating the operating member and an elastic member for urging the operating member to a non-operating position, an elastic member support portion for supporting the elastic member on at least one of both side walls of the base. Is provided, the elastic member is provided between the elastic member support portion and the operation member, and further, the operation member has both side walls, and both side walls of the operation member are the base. The feature is that it can be moved by being guided by both side walls.
Further, the seatbelt device of the invention according to claim 2 is equipped on a seat of a transportation system such as an automobile, and a seatbelt that restrains and protects an occupant with a seatbelt in an emergency such as a collision by latching a tongue on a buckle. The device is characterized in that the buckle is the buckle according to claim 1.

0006
[Action]
In the buckle according to the present invention configured as described above and the seatbelt device provided with the buckle, the elastic member is supported by the elastic member support portion provided on one side wall of the base. Therefore, unlike the conventional case, the spring support member spanned on both side walls becomes unnecessary, the number of parts is reduced, and the assembly man-hours and cost are reduced.
In that case, since the elastic member is positioned eccentrically from the center in the width direction of the operating member toward the one side edge side, the urging force of the elastic member acts eccentrically on the operating member. However, since both side walls of the operating member are guided by both side walls of the base, the operating member operates smoothly even if the urging force of the elastic member acts eccentrically in this way.

Support grooves 2d and 2e that rotatably support the rotation shafts 4a and 4b of the latch member 4 and both end portions 5a and 5b of the lock pin 5 are supported on both side walls 2a and 2b of the base 2, respectively. The convex guide holes 2f and 2g for guiding and the guide grooves 7a and 7b of the ejector 7 are slidably fitted to guide the ejector 7 in the longitudinal direction (the other one is the guide rail 2h). A spring support portion 2i that supports one end of the button spring 10 and a spring support portion that supports one end of the ejector spring 11 provided on one side wall 2b, which are provided symmetrically with respect to the longitudinal axis (not shown). 2j and the rotation shafts 12a and 12b of the inertial lever member 12 are supported so as to be rotatable and movable in the longitudinal direction, and the inertial lever member 12 is moved from the operating position to the non-operating position by being pressed by the operation button 6. When the tongue 3 is inserted, the guide grooves 2k and 2m for accommodating the pressed portions 12c and 12d for returning, the mounting portions 2n and 2o to which the mounting portions 13a and 13b of the spring holder 13 are fitted and detachably attached, and the tongue 3 are inserted. It is provided with guide portions 2p and 2q for guiding the tongue 3.

Although not shown in FIG. 4, the support groove 2d, the guide hole 2f, and the guide groove 2k formed on the side wall 2a are also formed in the same shape as the support groove 2e, the guide hole 2g, and the guide groove 2m, respectively. In the following description, each reference numeral is not used in the drawings, but the longitudinal hole portion 2f ₁ , the vertical hole portion 2f ₂ , the lock pin holding portion 2f ₃ , the guide portion 2f ₄ , and the R portion 2f. Describe as _5.

The lower end of the lock pin 5 is always in contact with the upper surface of the latch member 4, and is set by the spring force of the slider spring 9, and the convex guide holes 2f, 2g in the longitudinal direction holes 2f ₁ , 2g ₁ The convex guide holes 2f, 2g are set by the above-mentioned locking position that locks the latch member 4 to the latched state when the tongue 3 and the latch member 4 are latched, and the release operation force of the operation button 6. The above-mentioned non-locking position, which is located in the vertical hole 2f ₂ , 2g ₂ and is to the right of the locking position, is set so that the latch member 4 is in the unlatched state with the tongue 3. Further, the lock pin 5 has a substantially rectangular cross-sectional shape or a substantially inverted trapezoidal shape having a short lower side. Then, one corner portion 5c of the lock pin 5 _{moves while constantly contacting the respective guide portions 2f 4} , 2g ₄ and the respective R portions 2f ₅ , 2g ₅ of the convex guide holes 2f, 2g, and the lock pin also The upper surface 5d of 5 moves while abutting on the _{holding portions 2f 3} , 2g _3. The corner portion 5c is an R portion, and it is desirable that the diameter of the R portion be as small as possible.

The inertial lever member 12 constitutes a shockproof system that prevents the lock pin 5 and the operation button 6 from moving to the latch release position due to inertia when the tongue 3 and the buckle 1 are latched. The inertial lever member 12 includes a lever 12e, 12f, a mass body 12g, 12h whose center of gravity G is set at a position substantially orthogonal to these levers 12e, 12f, and a spring support portion 12i that supports one end of the lever spring 14. And further equipped. In that case, the mass of the mass bodies 12g and 12h is such that the moment around the rotation shafts 12a and 12b due to the inertial force acting on the center of gravity G of the mass bodies 12g and 12h due to inertia moves the operation button 6 in the latch release direction. The inertial lever member operating portion 6d is set to be larger than the moment around the rotating shafts 12a and 12b due to the force pushing the pressed portions 12c and 12d of the inertial lever member 12 toward the non-operating position of the inertial lever member 12. There is.

In the non-latch state of the buckle 1 in which the tongue 3 is not latched, the ejector 7 is set to the left limit position by the spring force of the ejector spring 11 as shown in FIGS. 2 and 5A. At this left limit position of the ejector 7, the ejector 7 pushes up the joggle portion 4c of the latch member 4, and the bottom portion 4c ₁ of the joggle portion 4c of the latch member 4 is substantially in point contact with the protrusion 7c on the upper surface of the ejector 7. It will be in the mounted state. In this state, the latch member 4 is disengaged from the insertion passage of the tongue 3 and is set to a non-latch position that does not latch with the tongue 3. Further, at this time, the lock pin 5 abuts on the upper surface of the latch member 4 and is pushed up by the latch member 4, and is set to the unlocked position of _{the vertical hole portions 2f 2} , 2g _{2 of the convex guide holes 2f, 2g.} Has been done. Further, in the non-latch state of the buckle 1, the levers 12e and 12f of the inertial lever member 12 are placed on the lock pin 5, and therefore the lock pin 5 is pushed up to the non-locking position, so that the inertial lever The member 12 is set so that the levers 12e and 12f are in the non-operating position shown by the dotted line in FIG. 5A. Further, the rotation shafts 12a and 12b of the inertial lever member 12 are in contact with the rotation shaft support portion 2m ₁ by being pulled to the right by the spring force of the lever spring 14.

In this state, when the operation button 6 is further moved to the right, the lock pin operating portion 6e moves the lock pin 5 to the right. When the lock pin 5 reaches a position where it can be moved to the _{vertical hole 2g 2 , the lock pin 5 cannot be held by the holding portion 2g 3} , so that the latch member 4 rotates clockwise around the rotating shafts 4a and 4b. It will be possible. At this time, the lock pin 5 is located directly below the levers 12e and 12f. Since the lock pin 5 _{cannot be suppressed by the restraining portion 2g 3} and the ejector 7 is urged in the latch release direction by the spring force of the ejector spring 11, the ejector 7 flips the latch member 4 upward and latches. The member 4 rotates clockwise around the rotation shafts 4a and 4b, and the joggle portion 4c escapes from the locking hole 3a of the tongue 3 and at the same time pushes out the tongue 3 to the left. At this time, the lock pin 5 is pushed up by the latch member 4 as the latch member 4 rotates clockwise, and enters the vertical holes 2f and 2g. Further, since the lock pin 5 pushes up the levers 12e and 12f, the inertial lever member 12 rotates clockwise around the rotation shafts 12a and 12b.

[0032]
【Effect of the invention】
As is clear from the above description, according to the buckle of the present invention and the seatbelt device provided with the buckle, the elastic member is supported by the elastic member support portion provided on at least one of the side walls of the base. , It is possible to eliminate the need for spring support members spanning both side walls as in the past. Therefore, the number of parts can be reduced, and the assembly man-hours and costs can be reduced.
Further, in that case, the urging force of the elastic member acts eccentrically on the operating member, but since both side walls of the operating member are guided to both side walls of the base, the urging force of the elastic member acts eccentrically. Even so, the operating member can be operated smoothly.

Claims (2)

The base having both side walls, and the side walls are rotatably supported between the non-engagement position and the engagement position, and are biased toward the engagement position, and the tongue is inserted into the predetermined position. A latch member that pivots to an engagement position to engage the tongue, an operation member for disengaging the tongue and the latch member in the engagement state, and biasing the operation member to the non-operation position In a buckle comprising at least an elastic member
An elastic member support portion that supports the elastic member is provided on at least one of both side walls of the base, and the elastic member is provided between the elastic member support portion and the operation member,
Further, the operating member has both side walls, and the both side walls of the operating member are guided by the side walls of the base to be movable. In a seat belt device that is installed in a seat of a transportation system such as an automobile, and the tongue is latched by a buckle to restrain and protect an occupant with a seat belt in an emergency such as a collision,
The seat belt device according to claim 1, wherein the buckle is the buckle according to claim 1.

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