JPS6096201A - Buckle apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF APPLICATION OF THE INVENTION 1 The present invention relates to a buckle device for a seat belt device used to protect occupants in a vehicle emergency.

[Background Art] In a seat belt device, a tongue plate attached to the end of the webbing for restraining an occupant is engaged with this type of device, so that the webbing is attached to the occupant.

However, in conventional devices of this type, the above-mentioned engagement operation was performed by guiding the tip of the tongue plate to its insertion port and then pushing it further, which facilitated the operation of attaching the webbing for occupant restraint. This was inconvenient in terms of achieving this.

[Object of the invention] The present invention has been made in view of the above-mentioned conventional problems, and
The purpose is to provide a buckle device that facilitates the operation of attaching webbing for occupant restraint.

[Summary of the Invention] In order to achieve the above object, the present invention includes an insertion detector that detects insertion of a tongue plate into a tongue plate insertion slot, and a retraction device that pulls in a tongue plate that is not inserted into the tongue plate insertion slot. [Embodiments of the Invention] Hereinafter, based on the drawings, a drive device for driving a retraction device according to an insertion detection signal of an insertion detector, and a latch mechanism for latching the retracted tongue plate. An embodiment of the buckle device according to the present invention will be described.

FIG. 1 shows the external appearance of this embodiment, in which the device is attached to the tip of an extension plate IO that stands up from the vehicle body.

This device has a tongue plate insertion port 12 on its tip side.
and a tongue plate 1 inserted into this.
4 is attached to the tip of the webbing for restraining the occupant.

Note that the base end of the occupant restraint webbing is locked to the vehicle body.

FIG. 2 shows this embodiment in an exploded state.

The buckle body 18 shown in FIG. 2 is attached to the tip of the extension plate 10 shown in FIG. A support hole 22 and rivet holes 24, 26 are formed in this mounting portion 20, and claws 28.
3o is provided.

On the other hand, as shown in FIG. 3, the extension play 10 is made up of leaf springs of similar shape stacked one on top of the other, and a neck portion 32 is formed by cutting out the side surface near the tip.

In the same figure, the head 34 formed at the tip of the neck 32 is slightly bent downward from the main body to form a portal shape when viewed from the longitudinal direction of the extension 10 (2). Its neck 3211
11 is formed with gill portions 36.

The head 34 is inserted into the support hole 22 as shown in FIG.
7 times in 30.

Furthermore, the screw holes 38 and 40 formed in the shoulder of the extension plate IO and the rivet holes 24 of the mounting part 20 are
．． As shown in FIG. 4, rivets 42 and 44 are inserted into 26, and the mounting portion 20 is fixed to the extension plate 10 along these K sides.

As a result, this device is erected via the extension plate IO.

The lower cover 46 shown in FIG. 2 is attached to the buckle body 18 described above, and the upper cover 48 shown in the same figure is coupled with the lower cover 46.

The lower cover 46 is formed into a substantially rectangular tray shape.
l On the front side, there is a notch for forming the tongue plate insertion opening 12, and on the back side, there is the extension plate l.
A cutout 50 into which an O is inserted is formed in each case.

An escape hole 52 for a slide portion 56 is formed in the front central portion of the lower cover 46.

The buckle tip 18 is located above the lower cover 46, and the head 60 of the catch 54 is guided in the left and right direction in the figure by a guide groove 58 formed in the front part of the buckle tip 18. 60 is in a state of protruding from guide #58.

Leg plates 62 formed on both sides of the buckle body 18
, 64 are provided with guide claws 66 and 68, respectively. 68 is guided below. Therefore, the head 60 protruding from the guide #158 is pressed rightward in the figure by the tip of the engaging portion 16, and the catch 54 is thereby moved rightward in the figure.

In this way, the tongue plate 14 moves the catch 54 to the right in the figure, but the tip of the lock pawl 72 of the lock plate 70 is pressed onto the head 60 of the catch 54.

The lock plate 70 is included in a latch mechanism that latches the tongue plate 14 moved from the tongue plate 12 into the apparatus, and its base 74 is plate-shaped.

A neck portion 76 having a substantially U-shaped cross section is provided on the front side of the base portion 74, and the lock claw 72 is further provided on the front side of the neck portion 76.
A plate-shaped head 78 is formed at the tip.

Furthermore, a rectangular hole 80 is formed in the center of the neck 76, and a shoulder 82 of the lock plate 70 is connected to the leg plate 6.
2.64 are respectively hooked to a step 84 formed between the two ends. This hook allows the lock pawl 72 of the block plate 70 to swing vertically in FIG. 2.

A of the catch 54 is a lock plate 70
is slid by the tongue plate 14 on the lower side,
Since the device is configured as described above, when the tongue plate 14 is subsequently moved further into the device, the head 60 can enter into the rectangular hole 80, thereby allowing the locking pawl 72 to enter the rectangular hole 80.
can be lowered in the figure and entered into the lock hole 86 formed in the retaining part 16. As a result, the tongue plate 14 is latched.

The lock plate 70 is biased downward in the drawing by a lock pin 88.

This lock bin 88 is guided in the left and right direction in FIG. The lock pin holder 94 is biased toward the left in FIG. 9 by a return spring 98.

The lock pin 88 is the upper surface of the neck portion 76, and the lock claw 72 can be biased downward by pressing the hard surface of the left 1gl1 in the figure toward the left of the spring 98.
As the retaining portion 16 moves, the upper surface of the neck portion 76 moves and reaches the upper surface of the head portion 78 when the latching is performed.

As described above, the tongue plate 14 is locked by the latch mechanism in this device, but it is possible to unlock it by operating the slipper 100. At that time, the tongue plate 14 is locked. Ejected from this device.

In FIG. 2, release claws 102 and 104 are formed inwardly at the tips of the arms provided on both rear sides of the release lever 100, and the release levers 102 and 104 are attached to the left side of FIG. 9 by the return spring 106. is biased in the direction.

Further, guide holes 108 and 110 are formed in the leg plates 62 and 64, and release claws 102 and 104 are respectively inserted into these from the outside.

As a result, when the release lever 100 is pushed toward the right in the figure against the biasing force of the return spring 106, the slope provided inside the release lever 100 moves from the neck 76 of the lock plate 70 to the head 78. The lower part of the slope leading thereto is pressed, and the lock pawl 72 of the lock plate 70 is retracted upward from the lock hole 86.

At this time, since the catch 54 is biased to the left by the ejector spring 114 via the ejector 112, the tongue play) is ejected from the device to the left in the figure.

The base end of the spring 106 is externally fitted onto a spring bearing shaft 118 of a spring holder 116, so that the p1 holder 116 is supported while receiving the internal pressure of the apparatus.

Further, the base end of the spring 114 is externally fitted onto a spring bearing shaft formed on the right side of the guide #158 in FIG.

Here, this device includes an insertion detector that detects the insertion of the tongue plate 14 into the tongue plate insertion opening 12, a retraction table that automatically retracts the tank plate 14 inside, and an insertion detection signal that drives the retraction device. For this reason, this embodiment is constructed as follows.

In FIG. 2, bearing plates 142 are located on both inner surfaces of the tongue plate insertion opening 12 of the upper cover 48 and at the forefront.
．． 144 is housed through a spacer (not shown).

Long shaft holes 146 and 148 are formed in the lower portions of the bearing plates 142 and 144, respectively, and the long axis directions are set in the left and right directions in the figure. 152 are formed respectively.

A roller 154 is provided in the long shaft hole 146 and the long shaft hole 148.
The roller shaft of 1 is in the shaft holes 150 and 152,
56 roller shafts are each rotatably inserted and protrude from the bearing plate 142 toward the inner surface of the upper cover 116, and a bevel gear 158 is attached to the tip of the nine roller shafts.

Furthermore, a bevel gear 160 that meets the bevel gear 158 is provided between the bearing plate 142 and the inner surface of the Atsu JR cover 1160, and the bevel gear 160 is driven by a DO motor 162. Therefore, the p roller 156 is rotationally driven by the DO motor 162 via the bevel gears 160 and 158.

Further, springs 164 and 166 for biasing the roller 154 in the left direction in FIG.
In the figure, a 'J-mit switch 168 for detecting insertion of the tongue plate is housed on the right side of the long shaft hole 146.

In FIG. 5, the DO motor 162 is driven and controlled by a motor drive circuit 170, which is configured mainly by a microcomputer and forms the WB drive device.

This motor promotion time lol! r170 stick switch 16
8 is turned on, the DO motor 162 can be started to be driven, and when the motor drive current ejected by the current detector 172 exceeds a predetermined value, the DO motor 162 is turned on.
Stop the drive.

The device of this embodiment has the above configuration, and its operation will be explained below.

When driving is started, the webbing is attached to the passenger in advance, and at that time the engaging portion 16 of the tongue plate 14 is guided to the tongue plate insertion opening 12.

At this time, the roller 54 is moved by the spring 164° 166 to the tongue plate insertion opening 121 of the long shaft hole 146, 148.
11I1 as shown in FIG. 6 (the spring 164 is omitted), and the tip of the retaining portion 16 comes into contact with the upper front side thereof.

Then, the retaining part 16 is pushed further and the roller 54 is moved to the right in FIG. 1 against the urging force of the springs 164 and 166 as shown in FIG. 7 (the spring 164 is omitted). Then, the limit switch 168 is turned on by the roller shaft of the roller 54. In this state, the rollers 54 are elastically deformed, and the tongue holder 14 is held between the rollers 54°156.

The bevel gear 1 is turned on by turning on the limit switch 168.
One waller 156 connects to the DO motor 162 via 60.158.
As shown in FIG.
6 is driven to the right by the roller 156 between the rollers 154 and 156 and drawn into the apparatus.

@9 Figure 70 shows a 70-chart of the motor drive circuit 170 that controls the drive of the DO motor 162.
In the first step 200 the limit switch 168
It is determined whether or not the switch is turned on.

If it is determined in step 200 that the limit switch 168 is turned on, the DO motor 16
2 pivoting is performed in step 202, and in the next step 204, it is determined whether the motor drive current detected by the WL flow jetter 172 is greater than or equal to a predetermined value tti, and it is determined that it is not greater than or equal to the predetermined value. If so, the DO motor 162 continues to be driven.

When the retaining part 16 is drawn into the device in this manner, the head 60 of the catch 54 is pushed forward by the tip of the retaining part 16 with the lock pawl 72 of the lock lever 70 in contact with the head 60 of the catch 54. It is moved toward the rectangular hole 80 of the pick plate 70.

The movement of the head 60 of the catch 540 causes the lock claw 72 of the block plate 70 to move.
Since it is no longer blocked by the head 60, the lock bin 88
By the urging force of! In Figure 2, the tongue plate 14 is driven downward and enters the lock hole 86, preventing the tongue plate 14 from being pulled out.

When the tongue shield 14 engages with the lock pawl 74 in this manner, the retaining portion 16 is not further retracted, and therefore the driving current of the motor 168 increases rapidly.

This causes an affirmative determination in step 204 of FIG. 9 above.

When this positive determination is made, the motor drive circuit 170
In step 206, the drive of the DO motor 162 is stopped.

As described above, when the insertion of the ring plate 14 into the tongue plate insertion opening 12 is detected, the lock plate 14 is pulled into the inside of the device by the pulling device including the DC motor 162. When the retraction is completed, the retracted tongue plate 14 is latched by the latch mechanism including the lock plate 70 and tangled with the present device.
When these conditions are met, the DC motor 162 is stopped and turned to the side.

By stopping the DC motor 162, vJt'F= of this device is completed when the shear webbing is attached, and then the vehicle starts driving.

Further, when the webbing is released after driving the vehicle, the release lever 100 is pushed to the right in FIG. 2. This series series claw 102,
104 is a guide hole ios.

110 to the right in the figure, and the release lever 10
The lock plate 70 is pushed upward by the slope in the 0, and the lock pawl 72 is retracted upward from the lock hole 86 of the tongue plate 14.

At this time, since the catch 56 is urged leftward in the figure by the ejector spring 114 via the ejector 112', the tongue plate 14 is ejected leftward from the apparatus due to the urging force.

In this way, the tongue plate 14 is attached to the release lever 1oo.
When the button is pressed, the cyan lock is activated and the device turns on.

In FIG. 10, the Abe Yusei of this embodiment is shown in an exploded state.9 Since the other configurations of this embodiment are the same as those of the previous embodiment, their explanation will be omitted.

In this embodiment, the long diameter direction of the long axis holes 146, 148 is set in the vertical direction as shown in FIG. 1O, and a spring 164.
166 urges both ends of the roller shaft of the roller 154 upward in the figure.

Further, the limit switch 168 is mounted on the inner surface of the bearing plate 142 below the long shaft hole 146, and is turned on by the roller shaft of the roller 154 that is moved downward by the tongue plate 14.

Since this embodiment row is constructed as described above, as shown in FIG.
When the roller 156 is pushed further as shown in FIG. Driven on.

When the limit switch 168 is turned on, the DC motor 162 drives the roller 1 through the bevel gears 160 and 158.
56 is rotationally driven, and the engaging portion 16 is drawn into the main chamber as shown in FIG. Furthermore, Figures 11 and 12
The spring 164 is omitted in the drawings and FIG. 13.

In this way, it is also possible to set the long diameter direction of the long axis holes 146 and 148 in the vertical direction in the figure.

Incidentally, in both of the above embodiments, insertion of the tongue plate was detected by a mechanical switch.

It is also possible to replace the insertion with a switch that detects the insertion electrically, optically, or magnetically.

Furthermore, although the completion of retraction of the tongue plate has been carried out by monitoring the motor drive current, it is also preferable to detect the completion of retraction by monitoring the operation of the lock plate, lock bin, etc. In this case, if the detector is wired inside this device, the tongue plate will be automatically drawn into the device and latched by simply guiding the tongue plate into the plate insertion slot, making it easier to attach the webbing. It becomes possible to aim for.

[Brief explanation of the drawing]

Figure 1 is an external view of the first implementation row, Figure 2 is an exploded view of the first implementation row, Figure 3 is an explanatory diagram of the structure of the tongue plate fixed to the lock plate, and Figure 4 is the lock plate and tongue plate. Figure 5 is a circuit configuration diagram of the #g1 implementation row, Figures 6, 7, and 8 are operation explanation diagrams of the first implementation, and Figure 9 is the motor drive in Figure 5. A flowchart diagram explaining the control operation of the circuit, Figure 10 is an exploded view of the main part of the second implementation column, Figures 11, 12 and Ila are the second
It is an explanatory diagram of the action of the implementation sequence. 12... Tongue plate insertion slot, 14... Tongue plate, 18... Buckle body, 54... Catch, 70... Lock plate, 88... Lock bin, 142° 144... Bearing plate , 154,156...
・Roller, 162...DO motor, 164, 166・
... Spring, 168 ... Limit switch, 17
0...Motor drive circuit. Agent Patent Attorney Atsushi Nakajima Figure 3 Figure 4 0 Figure 5 Figure 6 d56 Figure 7 42 6 0 . 54146 0168 6 +46 Figure 8 154 Sip Note' Figure 10 Figure 11 Figure 13 ■ = ζ 42

Claims (1)

[Claims] (1) An insertion detector that detects tongue plate insertion in the tongue plate insertion slot, a retraction device that pulls in the tongue plate inserted into the tongue plate insertion slot, and a drive device that drives the retraction device based on the insertion detection signal of the insertion detector. and a latch mechanism that latches the retracted tongue plate.