JPH0540725Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a buckle device used in a vehicle seat belt device and into which a tongue plate is inserted and locked.

[Prior Art] Some buckle devices have a lock structure in which a lock plate as a lock member that engages with the tongue plate intersects the tongue plate at a substantially right angle to reliably support the tongue plate. There is a buckle device.

This type of buckle device is provided with a lock plate for locking the tongue plate, and when the tongue plate is inserted by the passenger, the lock plate is urged by the urging means and enters the locking hole of the tongue plate. The tongue plate is locked, thereby locking the tongue plate. The state in which the lock plate locks the tongue plate is maintained by the biasing force of the biasing means,
When the release button is pressed by the occupant, the lock plate is pulled out of the engagement hole of the tongue plate against the biasing force of the biasing means and is released, thereby causing the tongue plate to come off from the buckle device. It's getting old.

However, in the conventional buckling device,
The state in which the lock plate locks the tongue plate is maintained only by the urging force of the urging means, and if the vehicle falls into an emergency state, an inertial force greater than the urging force of the urging means is generated. When the force is applied in the opposite direction, it is conceivable that the lock plate is not urged by the urging means and slips out of the locking hole of the tongue plate, and the tongue plate comes off from the buckle device. From this, it is possible to set the urging force of the urging means to be large, but in this case, the insertion force of the tongue plate when locking the tongue plate to the buckle device or the release button when removing the tongue plate from the buckle device Not only is there a problem in that the pressing force increases, resulting in poor operability, but it is not possible to reliably prevent the lock plate from slipping out of the locking hole of the tongue plate.

[Problems to be solved by the invention] Taking the above facts into consideration, the present invention has been developed to solve the problem without requiring an excessive release force in the release operation of the release button that releases the locked state of the lock member with the tongue plate. It is an object of the present invention to provide a buckle device which provides easy operability and in which the locking state of the lock member with the tongue plate is not released except by the release operation of the release button.

[Means for Solving the Problems] The buckle device according to the present invention is a buckle device that is used in a vehicle seat belt device and in which a tongue plate is inserted and locked. a locking member that moves substantially perpendicularly to the insertion direction of the tongue plate to lock the tongue plate; a locking member biasing means that biases the locking member in the locking direction with the tongue plate; By rotating to the rotation position, the lock member is moved in the direction away from the tongue plate against the lock member biasing means, and at the same time, as the tongue plate is inserted, the lock member is moved in the direction of engagement with the tongue plate. The return rotation from the second rotational position to the first rotational position is allowed by the lock member, and in the first rotational position, a lever is brought into contact with the lever that prevents the locking member from moving away from the tongue plate. a release button that can be moved in accordance with the rotation of the lever and rotates the lever from a first rotation position to a second rotation position to release the locked state of the lock member from the tongue plate; It is characterized by having a return biasing means for biasing the return rotation from the moving position to the first rotation position.

[Operation] In the buckle device having the above configuration, when the tongue plate is inserted by the passenger, the lock member is urged by the lock member urging means and moved in a direction substantially perpendicular to the tongue plate insertion direction, and the tongue plate is moved. This locks the tongue plate.

When the lock member is locked to the tongue plate, the lock member is supported by the biasing force of the lock member biasing means, and the tongue plate will not come off from the lock member during normal use.

When the vehicle enters an emergency state while the lock member is locking the tongue plate, an inertia force larger than the biasing force of the lock member biasing means acts in the opposite biasing direction, and the lock member When the lever is no longer biased, the lever is prevented from moving away from the tongue plate by the biasing force of the return biasing means that biases the lever to return from the second rotation position to the first rotation position. Even in this case, the tongue plate will not come off the lock member.

When the release button is operated by the occupant from this tongue plate locked state and the lever is rotated from the first rotation position to the second rotation position against the biasing force of the return biasing means, this rotation occurs. As a result of the movement, the lock member is moved away from the tongue plate against the biasing force of the lock member biasing means and is removed from the tongue plate, and the tongue plate is removed from the buckling device of the present invention.

As a result, in addition to the urging force of the lock member urging means, the urging force of the return urging means prevents the lock member from moving away from the tongue plate,
In the release operation of the release button that releases the locked state of the lock member with the tongue plate, it is possible to obtain good operability without requiring excessive release force, and to release the lock member from the tongue plate. An excellent effect can be obtained in that the locked state with the plate is not released.

Furthermore, when the release button is released, the release force is transmitted from the release button to the lock member through the rotation of the lever, so the friction loss that occurs between the release button and the lever is small, and the release force is reduced. In addition, the release button can be moved according to the rotation of the lever, and the lever is held in its position between the first rotation position and the second rotation position. , the position of the release button is clearly different between the locked state of the lock member with the tongue plate and the released state where this locked state is released, and each state can be easily recognized by visual inspection.
Extremely good operability can be obtained.

[Embodiment] FIGS. 1 to 3 show a buckle device 10 to which the present invention is applied and a tongue plate 12 that is inserted and locked in the buckle device 10. First, each member of the buckle device 10 will be explained with reference to FIG.

The buckle body 16 is composed of a lower body 18 and a top body 20.

The lower body 18 is formed from a single steel plate having the required strength, and the front flat plate surface 18A and the rear flat plate surface 18B are connected from the front flat plate surface 18A to the rear flat plate surface 18.
They are connected by an inclined surface 18C that slopes upward toward B. Projections 22 extending further forward from both front ends are formed on the front flat plate surface 18A. A recess 24 (a recess when viewed from the back side in the state shown in FIG. 1) is formed at the rear of the protrusion 22 by shearing.

Further, on the front flat plate surface 18A, a long side leg portion 26 and a short side leg portion 28 are formed on the rear side of the recessed portion 24, bending upward at right angles and standing up.
A notch 30 is formed between the recess 24 and the side portion 26 of the side portion. A rectangular opening 32 is formed in the center from the front flat plate surface 18A to the rear flat plate surface 18B. A rectangular opening 34 is formed in the rear flat plate surface 18B, and a trapezoidal tongue piece 36 that projects into the opening 32 is formed.

The Atsupa body 20 is formed from a single steel plate having the required strength, and the front flat plate surface 20A and the rear flat plate surface 20B are connected from the front flat plate surface 20A to the rear flat plate surface 2.
They are connected by an inclined surface 20C that slopes downward toward 0B. Front leg portions 38 are formed at both front end portions of the front flat plate surface 20A and are bent downward and hanging down at right angles. A notch 40 is formed in the front leg portion 38 on the outer side of the intermediate portion. Front flat plate surface 20
A is sheared at the rear of the front leg portion 38 to form a recess 42 .

Further, on the front flat plate surface 20A, a side leg portion 44 is formed on the rear side of the recess 42 and is bent downward and hangs down at a right angle. The distal end of the side leg portion 44 is bent forward again into two to form a substantially C-shaped distal end portion 46, and the center portion is a through hole 48. Note that the width between the side leg portions 44 is wider than the width between the long side leg portions 26 and the short side leg portions 28 formed on the lower body 18. Recess 4
A notch 50 is formed between 2 and the side leg 44. From the front flat plate surface 20A to the rear flat plate surface 20B
A rectangular opening 52 is formed in the center. A recess 54 is formed on both sides of the front part of the opening 52, and a recess 56 is formed on both sides of the rear part. A rectangular opening 58 is formed in the rear flat plate surface 20B.

The lock plate 64, which is a lock member, is formed by molding a single steel plate having the required strength into a substantially E-shape.The legs protruding from the center are the tongue plate locking parts 66, and the legs at both ends are The protruding leg portions serve as C-shaped spring contact portions 68. The C-shaped spring contact portion 68 is formed with a lever contact portion 70 that protrudes outward in the width direction.

The C-shaped spring 72 is a plate spring having a substantially C-shaped cross section, and is deformed under pressure to store strain energy.

The lever 74 has a structure in which a pair of lever parts 76 formed from plate material into a substantially E-shape are connected by a bar 78. The lever portion 76 has a leg portion protruding from the center as a first block portion 79, one of the leg portions protruding from both ends serving as a release button abutment portion 80, and the other leg portion a lock plate abutment portion 82. bar 78
is a substantially cylindrical rod, which can be inserted into the through hole 48 formed in the atsupah body 20.

The lock plate spring 84, which is a lock member biasing means, is a plate spring having a substantially U-shaped planar shape.
A fixing portion 90 to 6 extends downward.
A rectangular opening 92 is formed in the fixing portion 90, and a portion that was located in this portion before the opening 92 was formed is cut out from the fixing portion 90 at a right angle as a rectangular tongue piece 94. . Leg portions 96 that protrude rearward are formed at both ends of the connecting portion 88 so as to be opposed to the leg portions 86 .

The ejector 98 has a main body part 100 and a lower guide part 1.
02, upper guide part 104, and spring support part 1
06 are integrally molded. The lower guide part 102 and the upper guide part 104 have a rectangular parallelepiped shape with a widthwise length shorter than that of the main body part 100, and are located at the lower and upper parts of the rear central part of the main body part 100. The spring support portion 106 has a substantially truncated conical shape, and its bottom portion is located on the back side of the main body portion 100, the lower guide portion 102, and the upper guide portion 104.

A release button 110 constituting a release button is integrally formed with a main body 112 and a pair of legs 114 extending downward from both sides of the main body 112. As shown in FIG. 2, lever abutting walls 116 are formed on both inner sides of the main body 112, and on the inner side in the width direction of the lever abutting walls 116, there is a wall extending downward from the front wall 112A of the main body 112. A sliding guide wall 118 is formed that protrudes toward. Also,
The main body portion 112 is formed with a cylindrical spring support portion 121 that protrudes rearward from the rear wall 112B. A long and narrow through hole 120 is bored in the leg portion 114 in the front-rear direction. Further, a second block portion 122 is formed at the upper rear end portion of the leg portion 114.

A cylindrical spring support portion 126 is formed in the spring holder 124 toward the front, and a groove portion 128 is further formed in the width direction of the spring support portion 126 on the non-protruding side. Further, an opening 130 with a rectangular cross section is formed in the spring holder 124 and communicates with the groove 128 and penetrates in the front-rear direction.
A tongue piece 132 is formed to protrude from the protruding side.

The release button spring 134 and eject spring 136 that constitute the return biasing means are as follows:
It is a compression coil spring.

The buckle cover 138 is composed of a lower cover 140 and a top cover 142. A tongue plate insertion opening 144 is formed at the lower front of the top cover 142, and an insertion opening 146 for the release button 110 is formed at the upper front.

Next, the procedure for assembling each of the above parts will be explained.

First, the ejector 98 is placed in the opening 32 of the lower body 18. The ejector 98 is the lower guide part 1
02 is fitted into the opening 32. Next, the atsupa body 20 is assembled to the lower body 18. A notch 40 formed in the front leg portion 38 of the upper body 20 is fitted into the protrusion 22 of the lower body 18 . The buckle body 16 is constructed by assembling the upper body 20 to the lower body 18. In this state, the upper guide portion 104 of the ejector 98 is fitted into the opening 52 of the atsupah body 20. Also,
The rear flat plate surface 18B of the lower body 18 abuts and overlaps with the rear flat plate surface 20B of the upper body 20.

Next, the rear flat plate surface 18B of the lower body 18 and the rear flat plate surface 20 of the atsupa body 20 overlap.
B is fitted into the groove 128 of the spring holder 124. With this fitting, the spring holder 124
The tongue piece 36 of the lower body 18 fits into the opening 130 formed in the spring holder 124 .
It is held in a state where it overlaps with 32.

The C-shaped spring 72 has a notch 30 and a notch 50 formed in the lower body 18 and the upper body 20.
The intermediate portion is fitted into the body, and both end portions are fitted and locked into the recesses 24 and 42 formed in both bodies.

The lock plate 64 is assembled to the buckle body 16 from above the upper body 20, the tongue plate locking part 66 is inserted between the recesses 54 of the opening 52, and the C-shaped spring contact part 68 is inserted into the notch 50. Further, an opening 92 formed in the fixing portion 90 of the lock plate spring 84 is fitted into the overlapping tongue piece 36 and the tongue piece 132, and one end side of the coil of the eject spring 136 is also fitted. Eject spring 136
The other end of the coil is fitted into a spring support portion 106 formed on the ejector 98. This forces the ejector 98 to the left in FIG.

The lower end surface of the tongue plate locking portion 66 is brought into contact with the upper surface of the main body portion 100 of the ejector 98, and the back surface is brought into contact with the front surface of the upper guide portion 104 of the ejector 98. The free end side of the leg portion 86 of the lock plate spring 84 is engaged with the upper end of the lock plate 64, and the lock plate 64 is urged downward in FIG.

The bar 78 of the lever 74 is inserted into the through hole 48 of the tip end 46 of the upper body 20 so that the first block part 79 and the release button contact part 80 are positioned to the right of the lock plate 64 in FIG. . As a result, the bar 78 crosses the back surface of the lower body 18, and the lever portion 76 is positioned outside both sides of the buckle body 16. The lever part 76 is located on the outside of the buckle body 16, and the first block part 79 corresponds to the lever contact part 70 of the lock plate 64, and the lever 70 is pivoted from the position shown in FIG. 2 in the counterclockwise direction in FIG. be restricted.

The release button 110 is attached to both ends 7 of the bar 78 of the lever 70 in a through hole 120 bored in the leg 114.
8A is fitted into the buckle body 16, and the sliding guide portion 118 comes into contact with the upper surface of the top body 20. One end side of the coil of the release button spring 134 is fitted into the spring support part 121 of the release button 110, and the other end side of the coil of the release button spring 134 is fitted into the spring support part 121 of the spring holder 124.
6 is fitted. As a result, the release button 11
0 is biased to the left in FIG. 2, and the second block part 1
22 comes into contact with the lever portion 76 of the lever 74 and urges the lever 74 counterclockwise in FIG. Therefore, the first block portion 79 of the lever 74 is pressed into contact with the release button contact portion 70 of the lock plate 64.

Finally, lower cover 140 and Atsupa cover 142
The buckle cover 138 consisting of the following is assembled to the buckle body 16 to complete the assembly of the buckle device 10. After the assembly is completed, the buckle device 10 is supported by the vehicle body through the openings 34 and 58 formed in the lower body 18 and upper body 20 by inserting and locking one end of a mounting webbing (not shown). As shown by the two-dot chain line in FIG. A tongue piece 152 corresponding to the tongue piece 148 is also formed on the rear flat plate surface 20B, and a through hole 1 corresponding to the through hole 150 is formed in this tongue piece 152.
54 and fix it to the anchor plate 158 with a rivet 156, and the anchor plate 1
It is also possible to support the vehicle body via 58.

Next, the tongue plate 12 will be explained.

The tongue plate 12 is formed from a single steel plate having a required strength, and includes a base portion 160 and an insertion portion 162 protruding from the base portion 160.
An opening 164 is formed in the center of the base 160, and a lock plate 6 is formed in the center of the insertion portion 162.
A locking hole 166 having a size corresponding to the width of the tongue plate locking portion 66 of No. 4 is formed. This tongue plate 12 has an opening 164 into which a webbing (not shown) for restraining an occupant is inserted and locked.

The operation of the buckle device 10 having the above-mentioned configuration will be explained below.

What is shown in FIG. 2 is a schematic side view showing a normal state in which the tongue plate 12 is not engaged with the buckle device 10. To the buckle device 10 in this state, the tongue plate 12 is
is inserted, the insertion part 1 of the tongue plate 12
The tip of the ejector 62 comes into contact with the front surface of the main body 100 of the ejector 98, and presses the ejector 98 rightward in the drawing against the biasing force of the ejector spring 136. The tongue plate 12 moves rightward in the drawing while pressing the ejector 98 until the locking hole 166 reaches below the tongue plate locking portion 66 of the lock plate 64.

Since the lock plate 64 is urged downward in the drawing by the lock plate spring 84, when the tongue plate 12 reaches the above position, the lock plate 64 moves downward in the drawing, and the tongue plate locking portion 66 is attached to the tongue plate 12. Locking hole 1
Insert into 66. At this time, the movement of the lock plate 64 allows the lever 74 to swing counterclockwise in FIG. 2, that is, from the second rotation position shown in FIG. 2 to the first rotation position shown in FIG. The release button 110 is urged by the release button spring 134 and moves to the left in FIG. 2 while swinging the lever 74 clockwise in FIG. 2 by the second block portion 122. . When the lever 74 and the release button 110 are in a state where the tongue plate locking portion 66 of the lock plate 64 is fitted into the locking hole 166 of the tongue plate 12, the first block portion 79 of the lever 74 is locked as shown in FIG. The second block portion 122 of the release button 110 is positioned directly above the lever abutting portion 70 of the plate 64 at a distance from the lever portion 70 of the lever 74.
It is located close to the right side of Figure 3 of 6. This state is the tongue plate locked state.

In this tongue plate locked state, the biasing force of the release button spring 134 is applied to the first block part 79 via the second block part 122, and the first block part 79 locks the lock plate 64.
The movement of the release button in the direction away from the lever contact portion 70 is prevented by the biasing force of the release button spring 134. That is, the biasing force of the release button spring 134 is also applied downward in FIG. 3 (in the direction in which the lock plate 64 is locked to the tongue plate 12).

Therefore, when the tongue plate is locked, the lock plate 64 is held in place by the lock plate spring 84.
In addition to the biasing force, the first block portion 79 also pushes the tongue plate locking portion 66 upward in FIG.
is reliably prevented from moving in the direction of slipping out of the locking hole 166 of the tongue plate 64.

As described above, in this embodiment, in addition to the biasing force of the lock plate spring 84, the tongue plate locking portion 66 prevents the lock plate 64 from moving in the direction of coming out of the locking hole 166 of the tongue plate 12 in the tongue plate locked state. Since the first block portion 79 is also prevented by the biasing force of the release button spring 134, the lock plate spring 84 is prevented by the inertial force during a vehicle emergency.
Even if the tongue plate locking portion 66 is bent, the movement of the lock plate 64 in the direction in which the tongue plate locking portion 66 comes out of the locking hole 166 of the tongue plate 12 is prevented by the first block portion 7.
9 (release button spring 13
4 because the lock plate spring 84 does not bend due to inertia in the direction in which it bends, and the first block portion 79 is supported by the biasing force of the release button spring 134). Therefore, the tongue plate locking portion 66 does not slip out of the locking hole 166 of the tongue plate 12, and the buckling device 1
Tongue plate 12 will not come off from zero.

When removing the tongue plate 12 from the buckle device 10, the occupant should move the release button 110 to the release button spring 1 from the state shown in FIG.
It is moved to the right in the drawing against the urging force of 34.
The release button 110 moves with the lower end surface of the sliding guide part 118 abutting the upper surface of the atsupa body 20,
The lever contact wall 116 moves while being in contact with the release button contact portion 80 of the lever 74. Therefore, as the release button 110 moves, the release button abutting part 80 of the lever 74 moves to the right in the figure, and the lock plate abutting part 82 and the first block part 79 move clockwise in FIG. 3 about the bar 78. and is rotated from the first rotation position to the second rotation position.

As a result of this swinging, the first block part 79 is removed from above the lever contact part 70, and at the same time, the lever contact part 70 is pushed up by the lock plate contact part 82, and the lock plate 64 is pushed up against the lock plate spring 84. is moved upward against the urging force of. The lock plate 64 is moved upward, and the tongue plate locking portion 66 comes out of the locking hole 166 of the tongue plate 12. At the same time, the ejector 98 biased by the ejector spring 136 moves to the left in the drawing, and the ejector 98 is moved to the left in the drawing.
8, the tongue plate 12 is pushed out of the buckle device 10 and returns to the state shown in FIG.

Note that the setting of the first block section 79 and the second block section 122 does not increase the movement force of the release button 110, so the operability of the release button 110 does not deteriorate.

[Effects of the invention] As explained above, in the buckle device according to the invention, in addition to the urging force of the lock member urging means, the lock member is moved in the direction away from the tongue plate by the urging force of the return urging means. In the release operation of the release button that prevents the lock member from being locked with the tongue plate, it is possible to obtain good operability without requiring excessive release force, and to release the lock member from the tongue plate. An excellent effect can be obtained in that the locked state of the lock member with the tongue plate is not released.

Furthermore, when the release button is released, the release force is transmitted from the release button to the lock member through the rotation of the lever, so the friction loss that occurs between the release button and the lever is small, and the release force is reduced. In addition, the release button can be moved according to the rotation of the lever, and the lever is held in its position between the first rotation position and the second rotation position. , the position of the release button is clearly different between the locked state of the lock member with the tongue plate and the released state where this locked state is released, and each state can be easily recognized by visual inspection.
Extremely good operability can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the buckle device according to the present invention, Fig. 2 is a schematic side view showing the assembled state of Fig. 1, and Fig. 3 shows the tongue plate locked state in Fig. 2. FIG. 6 is a corresponding schematic side view; 10... Buckle device, 12... Tongue plate, 64... Lock plate, 74... Lever,
79...First block part, 110...Release button, 122...Second block part, 134...Release button spring.

Claims (1)

[Scope of utility model registration request] A buckle device used in a vehicle seat belt device in which a tongue plate is inserted and locked,
A lock member that moves substantially perpendicularly to the direction of insertion of the tongue plate to lock the tongue plate as the tongue plate is inserted; and a lock member biasing means that biases the lock member in the direction of locking the tongue plate. By rotating from the first rotation position to the second rotation position, the lock member is moved in a direction away from the tongue plate against the lock member biasing means, and the tongue of the lock member is moved away from the tongue plate as the tongue plate is inserted. By moving in the locking direction with the plate, the second
There is a lever that allows return rotation from the rotation position to the first rotation position and prevents the lock member from moving away from the tongue plate in the first rotation position, and a lever that comes into contact with this lever and prevents the rotation of the lever. Accordingly, the release button is movable and rotates the lever from the first rotation position to the second rotation position to release the locking state of the lock member from the tongue plate, and the lever is moved from the second rotation position to the first rotation position. A buckle device comprising: return biasing means for biasing return rotation to a rotation position.