JPH0225284Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The invention is used in a vehicle seat belt device,
[Background technology] Regarding a buckle device for restraining an occupant by webbing [Background technology] A seat belt device allows an occupant to put on the webbing by engaging a tongue plate attached to the end of the webbing for restraining an occupant with a buckle device. This configuration allows for

This buckle device is provided with a locking mechanism on the buckle body, which engages with the inserted tongue plate to prevent the tongue plate from being pulled out.

[Problems to be Solved] However, the locking mechanism cannot engage with the tongue plate unless the tongue plate is inserted a predetermined insertion amount. Therefore, in order for the passenger to reliably insert the tongue plate into the engaged state, a predetermined insertion stroke and insertion force are required.

The present invention takes the above-mentioned facts into consideration, and allows the passenger to perform an auxiliary action for inserting the tongue plate when the passenger inserts the tongue plate.

[Means and effects for solving the problem] In the buckle device according to the present invention, a biasing means is provided to the buckle body, and this biasing means biases the tongue plate to be inserted in the direction of insertion into the buckle body. It is designed to perform an auxiliary action for engagement. When the tongue plate is inserted into the buckle body to the engagement insertion amount, a locking mechanism attached to the buckle body engages with the tongue plate to prevent the tongue plate from being pulled out. a contact member that is movable in the insertion direction of the tongue plate and that is brought into contact with the tongue plate when the tongue plate is inserted and is moved in the insertion direction of the tongue plate by following the tongue plate due to frictional force with the tongue plate; The abutment member is urged in the tongue plate removal direction until the insertion amount reaches a predetermined value smaller than the engagement insertion amount, and when the tongue plate insertion amount exceeds the predetermined value, the abutment member is urged into the tongue plate removal direction. and biasing means for biasing the plate in the insertion direction.

Therefore, when inserting the tongue plate, the contact member is urged in the tongue plate removal direction by the urging means until the tongue plate insertion amount reaches a predetermined value, and follows the tongue plate insertion movement. The abutting member is moved in the insertion direction of the tongue plate against the urging force of the urging means due to the frictional force with the tongue plate, but when the insertion amount of the tongue plate exceeds a predetermined value, the abutting member is moved. The tongue plate is moved in the insertion direction by the biasing force of the biasing means, and as a result of this movement, the tongue plate is pulled in the insertion direction by the frictional force with the contact member and inserted into the buckle body to the engagement insertion amount. The tongue plate insertion operation is assisted.

[Embodiment of the invention] Fig. 1 shows an exploded perspective view of a buckle device according to this embodiment, and Figs. 2 and 3 show sectional views taken along the - line and - line in Fig. 1, respectively. ing.

In this buckle device, a base plate 10 constitutes the main part of the buckle body, and a strap 14 is fixed to one end of the base plate 10 by a rivet 12, so that the buckle device is erected from the vehicle body via this strap 14. It's summery.

The front end of the base plate 10 is erected at a right angle, and a semicircular bent portion 16 is formed at the tip. Also, the side walls 18 on both sides are bent at right angles.
The tips of these side walls 18 form top plates 20 bent in directions facing each other. A tongue plate 22 insertion space is formed between the top plate 20 and the semicircular arc bent portion 16, and the tongue plate 22 can be inserted into this space as shown by arrow A in FIG. One end of the webbing 24 is secured to the tongue plate 22, and the other end of the webbing 24 is secured to the vehicle body via a winding device or the like.

A lock plate 26 is attached to the semicircular bent portion 16.
One end is accommodated and can be rotated around this one end. This lock plate 26 has an engaging pawl 28 protruding from approximately the center thereof, and is urged toward the top plate 20 by a leaf spring 30 interposed between the lock plate 26 and the base plate 10. Therefore, when the inserted tongue plate 22 reaches a predetermined insertion amount, the engaging claw 28 pushes the tongue plate 2 under the urging force of the leaf spring 30.
The tongue plate 22 is inserted into and engaged with the engagement opening 32 formed in the tongue plate 2, thereby preventing the tongue plate 22 from being pulled out. Therefore, the lock plate 26 constitutes the main part of the lock mechanism.

A cover 34 whose both sides are fitted into the side wall 18 accommodates a release button 36 between it and the top plate 20. As shown in FIGS. 2 and 3, this release button 36 has a spring seat 38 protruding from a part thereof.
A compression coil spring 42 is interposed between the spring seat 40 extending between the side walls 18. As a result, the release button 36 generates a biasing force in the direction of the semicircular bent portion 16.

A release protrusion 44 protrudes from a portion of the release button 36, and corresponds to a release arm 46 protruding from the lock plate 26. That is, when the release button 36 is moved from the state shown in FIGS. 2 and 3 against the biasing force of the compression coil spring 42, the release protrusion 44 comes into contact with the release arm 46, and the release arm 46 is moved against the leaf spring 3.
The engaging pawl 28 is pushed down against the urging force of 0 to cause the engaging pawl 28 to escape from within the movement trajectory of the tongue plate 22. As a result, when the tongue plate 22 is inserted into the base plate 10 and is in an engaged state, this engagement is released and the tongue plate 22 can be extracted.

Next, the biasing means and abutting member of this embodiment will be explained.

The main part of this biasing means is a pair of reversing arms 48
It is composed of. The center of the reversing arm 48 is pivotally supported on the side wall 18 by a pin 50, and an elastic roller 54 as an abutting member is fixed to one end by a pin 52. A portion of this roller 54 protrudes into the locus of movement of the tongue plate 22. A tension coil spring 58 is interposed between the pin 52 and a spring locking hole 56 formed in the base plate 10 as shown in FIG.
This tension coil spring 58 is adapted to apply a reversing force to the reversing arm 48, that is, as shown in FIG. 50 can be selectively given to two states that are farther from the semicircular arc bending part 16, and these two states are reversed when the axis of the tension coil spring 58 coincides with the axis of the pin 50 as a boundary. It is becoming more and more common.

A pin 60 protrudes from the other end of the reversing arm 48 to the opposite side of the pin 52, and is connected to the release button 3.
This corresponds to a pair of return levers 62 that protrude from 6. This return lever 62 is the release button 36
When the pin 60 moves away from the semicircular arc bent portion 16, that is, in the direction of disengaging the inserted tongue plate 22, the pin 60 moves from the state shown in FIG. 4B to the state shown in FIG. The reversing arm 48 is pressed in a direction away from the bent portion 16 .
It is designed to reverse the .

Next, the operation of this embodiment will be explained.

When the tongue plate 22 is moved in the insertion direction into the base plate 10 as shown in FIG. 4A, the tip of the tongue plate 22 comes into contact with the elastic roller 54 while passing near the semicircular bend 16. As a result, the elastic roller 54 rotates the reversing arm 48 clockwise in FIG. 4A about the pin 50. That is, the tongue plate 22
Following the insertion operation, the elastic roller 54 moves in the direction of arrow A due to the frictional force with the tongue plate 22.
This movement causes the reversing arm 48 to rotate clockwise in FIG. 4A about the pin 50. When this amount of rotation reaches a predetermined amount, that is, when the pin 52 is slightly further away from the semicircular arc bending portion 16 than the pin 50, the rotational force by the tension coil spring 58 is reversed.
As shown in FIG. 4B, the reversing arm 48 rapidly rotates clockwise. Therefore, the elastic roller 54
generates a force that rapidly urges the tongue plate 22 in the direction of arrow A due to frictional force, and as a result, the tongue plate 22 is largely inserted into the base plate 10 and the engagement opening 32 engages the engagement claw 2 of the lock plate 26.
It meshes with 8.

As a result, the occupant can obtain a secure engagement state by slightly inserting the tongue plate 22 into the base plate 10, and the webbing installation work becomes extremely simple.

In the event of a vehicle emergency, the tongue plate 22 is reliably engaged with the lock plate 26, so that the occupant is securely restrained by the webbing 24.

When the occupant exits the vehicle after the normal running state of the vehicle ends, the release button 36 may be moved against the biasing force of the compression coil spring 42.
As a result, the release protrusion 4 of the release button 36
4 contacts the release arm 46 and rotates the lock plate 26 clockwise in FIG.

In this case, as shown in FIG. 4C, the return lever 62 that moves together with the movement of the release button 36 presses the pin 60 of the reversing arm 48 in the direction away from the semicircular arc bending part 16.
The reversing arm 48 reverses in the opposite direction, and the elastic roller 54 returns to its original state. Therefore, it is possible to prepare for the next insertion operation of the tongue plate 22.

Next, FIG. 5 shows a second embodiment of the present invention. In this embodiment, the roller 54 is formed with a longer axial length than in the previous embodiment, and the pin 7 passing through the axial center
0 is attached to the tip of the reversing arm 48.

A circular hole 72 bored in the middle of these reversing arms 48 is fitted into a pin 74 protruding from the side wall 18 of the base plate 10 and is pivotally supported.
Further, one end of a tension coil spring 58 is locked to an arm 76 protruding from between this circular hole 72 and the roller 54, and the other end of this tension coil spring 58 is inserted into a small hole 78 formed in the buckle base 10. It is locked.

Therefore, in this embodiment as well, the tension coil spring 5
8 passes over the axis of the pin 74, and when the tongue plate is inserted, it is suddenly pulled into the buckle, and when the release button 36 is operated, the return lever 62 moves the reversing arm 48 to the above-mentioned position. It can be rotated as in the example.

In the above embodiment, a combination of the reversing arm 48 and the tension coil spring 58 is used as a means for generating an insertion biasing force on the webbing 24, but the present invention is not limited to the above configuration. Any urging means that can be applied is applicable.

[Effect of the invention] As explained above, in the buckle device according to the present invention, the buckle body is provided movably in the insertion direction of the tongue plate, and when the tongue plate is inserted, the buckle is brought into contact with the tongue plate, and the buckle is brought into contact with the tongue plate due to the frictional force with the tongue plate. The contact member is moved in the tongue plate insertion direction following the tongue plate, and the contact member is moved in the tongue plate extraction direction until the insertion amount of the tongue plate reaches a predetermined value smaller than the engagement insertion amount. and a biasing means that biases the abutment member in the tongue plate insertion direction when the insertion amount of the tongue plate exceeds the predetermined value, which has an excellent effect of simplifying the webbing attachment operation. has.

[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 sectional view corresponding to the sectional view taken along the line in Fig. 1, and Fig. 3 is a sectional view taken along the line taken in Fig. 1. 4A to 4C are enlarged operational views of a part of FIG. 3, and FIG. 5 is an exploded perspective view showing a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Base plate, 22... Tongue plate, 24... Webbing, 26... Lock plate, 28... Engaging claw, 36... Release button, 48... Reversing arm, 54... Elastic body roller, 58... ...Tension coil spring, 62...Return lever.

Claims (1)

[Scope of utility model registration request] When the tongue plate is inserted into the buckle body to the engagement insertion amount, a locking mechanism attached to the buckle body engages with the tongue plate to prevent the tongue plate from being pulled out. a contact member that is movable in the insertion direction of the tongue plate and that is brought into contact with the tongue plate when the tongue plate is inserted and is moved in the insertion direction of the tongue plate by following the tongue plate due to frictional force with the tongue plate; The abutment member is urged in the tongue plate removal direction until the insertion amount reaches a predetermined value smaller than the engagement insertion amount, and when the tongue plate insertion amount exceeds the predetermined value, the abutment member is urged into the tongue plate removal direction. A buckle device comprising a biasing means for biasing the plate in the insertion direction.