JP5501308B2 - Tongue attachment / detachment mechanism for buckle device - Google Patents

Description

  The present invention relates to a tongue attaching / detaching mechanism of a buckle device particularly in a shoulder anchorage of a seat belt for protecting an occupant seated on a vehicle seat.

  2. Description of the Related Art Conventionally, a seat belt device for a vehicle or the like has been provided with a buckle device for fixing a tongue provided at an end portion or a folded end portion of a seat belt webbing in a state of restraining a passenger to the vehicle body side. (For example, refer to Patent Document 1).

  The applicant of the present application previously applied for the purpose of making it possible to insert the insertion portion of the shoulder tongue plate into the tongue insertion port without the buckle button being obstructed by the tongue plate of the shoulder tongue plate. Examples are shown in FIGS. That is, as shown in FIG. 15, the seat belt webbing 104 is pulled out from and retracted from the spool 106 biased in the winding direction of the retractor device 105 disposed on the lower right (left) side of the rear side of the seat back S2. The tongue plate 103 held at one end of the seat belt webbing 104 is fastened to the inner anchorage 101 between the front lower left (right) side of the seat back S2 and the seat seat surface S1. A belt W is detachably engaged with an inner buckle 102 that can be moved in and out.

  Further, as shown in FIG. 15, a shoulder buckle 107 is provided on the upper right (left) side (upper side where the retractor device 105 is located) of the seat back S <b> 2, and the seat belt between the tongue plate 103 and the retractor device 105. A shoulder tongue plate 108 movably attached to the webbing 104 is inserted into a tongue insertion port 109 of the shoulder buckle 107 so as to be engageable. A buckle button 110 that functions as an engagement release button for releasing the engagement state of the shoulder tongue plate 108 is provided on the tongue insertion port 109 side.

  Further, as shown in FIGS. 16 and 17, the shoulder tongue plate 108 has a substantially L-shaped tongue plate 108b and insertion portion 108c through a hole 108a through which the seat belt webbing 104 is passed. Are connected. The insertion portion 108c of the shoulder tongue plate 108 is inserted into the tongue insertion port 109 with the tongue plate 108b facing away from the position of the buckle button 110 (forward) so that the buckle button 110 is not obstructed by the tongue plate 108b. (See FIG. 17).

JP 2005-144138 A

  However, the insertion portion 108c of the shoulder tongue plate 108 can be inserted into the tongue insertion port 109 with the tongue plate 108b facing either forward or backward. In other words, when the shoulder tongue plate 108 is inserted into the tongue insertion opening 109 of the shoulder buckle 107, the shoulder tongue plate 108 can be engaged with the shoulder buckle 107 in any direction.

  From this, as shown in FIG. 16, the buckle button 110 is covered by the tongue plate 108b of the shoulder tongue plate 108, that is, the tongue plate 108b is directed to the side where the buckle button 110 is located (rear). If the insertion part 108c of the shoulder tongue plate 108 is inserted into the tongue insertion port 109, it is naturally impossible to approach the buckle button 110. This not only makes it difficult to separate the shoulder tongue plate 108 during use, but also hinders the sliding of the seat belt webbing 104 due to the reverse attachment of the shoulder tongue plate 108.

  On the other hand, as shown in FIG. 17, the insertion portion 108c of the shoulder tongue plate 108 is tongued with the tongue plate 108b facing away from the position of the buckle button 110 (forward) so that the buckle button 110 is not obstructed by the tongue plate 108b. When inserted in the insertion port 109, the buckle button 110 is always exposed, and the child is playful or the adult carelessly presses the buckle button 110 with fingers, leading to an unexpected accident. There was a problem such as.

  Therefore, the present invention was created in view of the conventional circumstances as described above, and when the tongue is inserted into the tongue insertion port of the buckle, the tongue is engaged with the buckle by insertion other than the forward posture of the tongue. Even if the buckle button that functions as a disengagement button is covered by the tongue, it is possible to approach the buckle button by using a tool such as an ignition key of the vehicle, It is an object of the present invention to provide a tongue attaching / detaching mechanism for a buckle device that can be easily separated during use of the tongue.

  In order to solve the above-described problems, in the present invention, a tongue plate having a tongue through which one end side of a seat belt is inserted, and a tongue plate that is disposed on an upper side of the seat and is detachably engaged with the tongue. A buckle device having a buckle and a buckle button for releasing the engagement, and the tongue plate ignites an ignition while the buckle button cannot be manually operated when the tongue is engaged with the buckle. A button cover having an operation key hole for enabling an operation with a key is provided.

  The tongue plate includes a protrusion for enabling insertion into the buckle in a normal posture while disabling insertion into the buckle in a reverse posture opposite to the normal posture.

  In the tongue attaching / detaching mechanism of the buckle device according to the present invention configured as described above, the button cover part covers the buckle button in a state where the buckle button cannot be manually operated. To prevent unintentional operations.

  At this time, the operation key hole allows the operation with the ignition key while the buckle button cannot be manually operated. Further, the protrusions interfere with the buckle so that the engagement after insertion into the buckle in the reverse posture opposite to the forward posture is impossible.

  According to the present invention, when the tongue is inserted into the tongue insertion port of the buckle, it is possible to obstruct the engagement of the tongue with the buckle by insertion other than the forward posture of the tongue, and the buckle button functioning as an engagement release button is provided. Even when covered with a tongue, for example, by using a tool such as an ignition key of a vehicle, it is possible to approach the buckle button, thereby easily separating the tongue during use.

  In other words, the present invention includes a button cover portion having an operation key hole for enabling the operation with the ignition key while making the buckle button impossible to operate manually. Therefore, it is possible to prevent a child from being playful or an adult from inadvertently pressing a buckle button with a finger and leading to an unexpected accident. Further, when approaching the buckle button, the engagement of the tongue with the buckle can be easily released via the operation key hole of the button cover.

  In addition, the tongue plate includes a protrusion for enabling insertion into the buckle in a normal posture while disabling insertion into the buckle in a reverse posture opposite to the normal posture. Therefore, when the tongue is inserted into the tongue insertion port of the buckle, it is impossible to engage the tongue with the buckle by inserting the tongue other than the forward posture of the tongue. Can be blocked. In addition, since the tongue plate cannot be inserted into the buckle in the reverse posture opposite to the normal posture, there is no problem such as the conventional sliding obstruction of the seat belt webbing due to the reverse attachment of the tongue plate. Don't make it happen.

It is the perspective view which looked at the tongue in this embodiment from the slanting back side. It is the perspective view which similarly looked at the tongue from the diagonally forward side. It is a front view of a tongue similarly. It is a side view of a tongue similarly. It is a bottom view of a tongue similarly. It is a top view of a tongue similarly. It is sectional drawing which shows the insertion state of the forward posture of the tongue with respect to a buckle. It is sectional drawing which shows the insertion state other than the forward posture of the tongue with respect to a buckle. It is sectional drawing which shows the state which cancels | releases engagement of the tongue with respect to a buckle in the insertion state of the forward posture of the tongue with respect to a buckle. It is a disassembled perspective view which shows the internal structure of a buckle apparatus. It is sectional drawing of the buckle apparatus in a tongue dissociation state. It is sectional drawing of the buckle apparatus of the state before the latch start at the time of tongue insertion. It is sectional drawing of the buckle apparatus of the state after a latch start. It is sectional drawing of the buckle apparatus at the time of insertion except the forward posture of a tongue. It is explanatory drawing which shows schematic structure of the seatbelt in a prior art example. It is sectional drawing of the state which similarly inserted the tongue in the tongue attachment / detachment mechanism of the buckle apparatus in a prior art example reversely. It is sectional drawing of the state which operates a buckle button in the tongue attachment / detachment mechanism of the buckle apparatus in a conventional example similarly.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Overall structure of the tongue plate 1 The tongue plate 1 according to the present embodiment is detachably engaged with a buckle device 10 described later of a detachable shoulder anchor disposed at the upper side of the seat back. As shown in FIGS. 1 to 6, the tongue plate 1 is a tongue in which a belt insertion portion 2 having a substantially U-shaped opening through which one end side of a seat belt webbing (not shown) is inserted is formed in the center. 3, and a tongue-shaped buckle insertion portion 4 having a rectangular locking hole 5 formed at the center thereof is connected to the tongue 3 in a substantially curved L shape.

  Further, from one end side of the tongue plate 1 (in the vicinity of the connecting portion of the tongue 3 and the buckle insertion portion 4), the buckle button 13 described later is not manually operated when the tongue plate 1 is engaged with the buckle device 10. A button cover portion 6 is provided so as to enable it, and an operation key hole portion 7 is formed in the center for enabling operation of a buckle button 13 (to be described later) using, for example, an ignition key IG.

  Further, on the lower surface of the tongue 3 located on the opposite side of the button covering portion 6 with respect to the buckle insertion portion 4, while being able to be inserted into the tongue insertion port 20 </ b> A of the buckle device 10 in the forward posture, Are formed with a pair of left and right projections 8a and 8b for making it impossible to insert the buckle device 10 into the tongue insertion port 20A in the reverse posture. Each of these protrusions 8 a and 8 b is provided symmetrically with respect to the longitudinal center line of the tongue 3 and the buckle insertion portion 4.

(2) Configuration of Buckle Device 10 Overall As shown in FIG. 10, the buckle device 10 is rotatable to a base 11 formed of a U-shaped frame having two left and right side walls and a bottom, and to both side walls of the base 11. A latch member 12 that is supported and functions as a buckle that can be engaged with the tongue plate 1 as an engaged member for the belt, and a buckle insertion portion 4 of the tongue plate 1 that is supported by the latch member 12 so as to be relatively movable on the upper surface. The slider lock member 14 prevents the latch member 12 from moving in the disengagement direction when the latch member 12 is engaged with the latch member 12, and is contracted between the slider lock member 14 and the latch member 12 so that the slider lock member 14 is And a slider spring 17 that is constantly urged toward the latch member 12. That is, the slider spring 17 is wound around the rod-shaped guide portion 14 </ b> A at the lower end of the slider lock member 14 and is loosely fitted in the guide hole 12 c of the latch member 12.

  A lock that is supported by holes on both side walls of the base 11 and presses the upper surface of the slider lock member 14 that prevents the latch member 12 from moving in the disengagement direction when the tongue plate 1 and the latch member 12 are engaged. A pin 16, a buckle button 13 functioning as a release button provided on both side walls of the base 11 so as to be movable in the longitudinal direction, and a groove on both side walls of the base 11 positioned between the buckle button 13 and the latch member 12. And an inertia lever 19 (having a lever-side engagement connecting portion 19a having a circular pin shape with a circular cross section).

  Furthermore, an ejector 15 is provided at the bottom of the base 11 so as to be slidable in the longitudinal direction of the base 11, and the ejector 15 is configured to separate the tongue plate 1 from the buckle device 10. An ejector spring 18 that is constantly biased, and an upper cover 20 and a lower cover 21 that are included so as to cover them from above and below are provided.

  In a state where the tongue plate 1 is disengaged with respect to the buckle device 10, the ejector 15 pushes the joggle portion 12 </ b> A of the latch member 12 in the clockwise direction, together with the lever side engagement connecting portion 19 a of the inertia lever 19. It will be in the locked state (refer FIG. 11).

  On the other hand, when the tongue plate 1 is engaged with the buckle device 10, the joggle portion 12 </ b> A of the latch member 12 is pushed counterclockwise, and the rear surface of the slider lock member 14 is locked by the lock pin 16. (See FIG. 13).

(3) Basic Operation of Buckle Device 10 Next, the engaging operation with the tongue plate 1 of the buckle device 10 of the present embodiment configured as described above will be described. First, in the non-engagement (dissociation) state of the buckle device 10 in which the tongue plate 1 is not inserted, the ejector 15 is set to the upper limit position by the spring force of the ejector spring 18 as shown in FIG. In this upper limit position of the ejector 15, the latch member 12 rotates upward (clockwise from the latched state) due to the relationship between the slider lock member 14, the lock pin 16 and the slider spring 17. At this time, the slider lock member 14 is moved to the right after being removed from the lock pin 16, the upper surface of the latch member 12 is in contact with the lever side engagement connecting portion 19a of the inertia lever 19, and the rear surface of the latch member 12 is It abuts against the front surface of the lock pin 16. In this state, the latch member 12 is set to a non-engagement position where the joggle portion 12A is disengaged from the tongue insertion passage and does not engage the tongue plate 1.

  When the buckle insertion portion 4 of the tongue plate 1 is inserted from the tongue insertion port 20A provided at one end of the upper cover 20 of the buckle device 10 from the non-engaged state of the buckle device 10 shown in FIG. The lower end of the buckle insertion portion 4 of the plate 1 comes into contact with the upper end of the ejector 15, and the ejector 15 is pressed downward. Then, the ejector 15 moves downward while contracting the ejector spring 18 in accordance with the insertion of the tongue, so that the suppression portions 15a and 15b (see FIG. 10) of the ejector 15 are pressed portions 12a and 12b ( By pushing downward (see FIG. 10), the latch member 12 rotates counterclockwise as shown in FIGS.

  As a result, the joggle portion 12A of the latch member 12 enters the tongue movement path and fits into the locking hole 5 of the buckle insertion portion 4 of the tongue plate 1, and the latch member 12 is in the engaged position. When the insertion force of the tongue plate 1 is released, the ejector 15 presses the lower end of the tongue with the spring force of the ejector spring 18, and the lower end inner edge portion of the locking hole 5 of the buckle insertion portion 4 of the tongue plate 1 is the jog portion 12A. , The tongue plate 1 is engaged with the buckle device 10, and the tongue plate 1 and the buckle device 10 are in the engaged state shown in FIG.

  At this time, due to the spring force of the slider spring 17, the slider lock member 14 enters below the lock pin 16 and the upper surface thereof is pressed against the lock pin 16. As a result, the slider lock member 14 holds the latch member 12 in the engaged position, so that the latch member 12 does not come out of the locking hole 5 of the buckle insertion portion 4 of the tongue plate 1, and the tongue plate 1 and the buckle device 10. The latch with is firmly held.

  As shown in FIG. 9, in order to release the engagement from the engagement state of the tongue plate 1 and the buckle device 10, an ignition key IG or the like is inserted into the operation key hole 7 of the button cover 6 and the buckle button When 13 is pushed downward, the buckle button 13 moves downward. Then, the buckle button 13 presses the slider lock member 14 downward, and the slider lock member 14 moves downward against the latch member 12 against the urging force of the slider spring 17. Then, the slider lock member 14 is disengaged from the lock pin 16 and the slider lock member 14 is not pressed by the lock pin 16. Then, the slider lock member 14 and the latch member 12 rotate clockwise, and the joggle portion 12A moves to the right. Since the ejector 15 is biased in the disengagement direction by the spring force of the ejector spring 18, the ejector 15 bounces off the latch member 12 to the right via the buckle insertion portion 4 of the tongue plate 1, and the latch member 12 and the slider The lock member 14 further rotates in the clockwise direction, and at the same time as the joggle portion 12A escapes from the engagement hole 5 of the buckle insertion portion 4 of the tongue plate 1, the tongue plate 1 is pushed out upward.

  When the latch member 12 contacts the lock pin 16, the clockwise rotation of the latch member 12 and the slider lock member 14 is stopped. At this time, the slider lock member 14 comes into contact with the lock pin 16 by the urging force of the slider spring 17. Finally, the ejector 15 is in the upper limit position, the latch member 12 is in the disengaged position, and the buckle device 10 is in the disengaged state in which the tongue plate 1 is disengaged (see FIG. 11).

  As shown in FIGS. 8 and 14, when the buckle insertion portion 4 of the tongue plate 1 is inserted into the tongue insertion port 20 </ b> A of the buckle device 10, the tongue is inserted in a posture opposite to the forward posture of the tongue plate 1. When the buckle insertion portion 4 is inserted so that the button cover portion 6 is located on the opposite side of the buckle button 13, the protrusions 8a and 8b described above are the upper ends of the tongue insertion port 20A. It hits the opening edge and is locked at a position just before the locking hole 5 of the buckle insertion portion 4 of the tongue plate 1 is inserted to a depth where it engages with the latch member 12. As a result, the tongue plate 1 cannot be engaged with the buckle device 10 by inserting the tongue plate 1 in a position other than the normal position, and the engagement of the tongue plate 1 after the insertion other than the normal position is prevented in advance.

  Thus, the protrusions 8a and 8b are locked by interference with the buckle device 10 at a position just before the locking hole 5 of the buckle insertion portion 4 of the tongue plate 1 is inserted to a depth where it engages with the latch member 12. Thus, the engagement by the latch member 12 during insertion of the tongue plate 1 other than the normal posture is reliably prevented by the protrusions 8a and 8b.

DESCRIPTION OF SYMBOLS 1 ... Tongue plate 3 ... Tongue 6 ... Button cover part 7 ... Key hole part 8a, 8b for operation ... Projection part 10 ... Buckle apparatus 12 ... Latch member (buckle)
13 ... Buckle button 14 ... Slider lock member IG ... Ignition key

Claims (2)

A tongue plate with a tongue through which one end of the seat belt is inserted;
A buckle disposed on an upper side of the seat and detachably engaged with the tongue; and a buckle device including a buckle button for releasing the engagement;
The tongue plate is
When the tongue is engaged with the buckle, the button cover portion having an operation key hole for enabling the operation with the ignition key while making the buckle button impossible to operate manually is provided. The tongue attachment / detachment mechanism of the buckle device. The tongue plate is
A protrusion is provided for enabling insertion into the buckle in a normal posture while disabling insertion into the buckle in a reverse posture opposite to the normal posture. The tongue attachment / detachment mechanism of the buckle device according to 1.

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