JPH0540727Y2 - - Google Patents

Description

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

[Prior Art] In a buckle device used in a seat belt device, a lock plate that engages with a tongue plate is moved in a direction substantially perpendicular to the insertion direction of the tongue plate, and the lock plate is moved in a direction substantially perpendicular to the insertion direction of the tongue plate so that the tongue is engaged with the tongue plate. There is a buckle device having a so-called bolt structure that intersects the plate at a substantially right angle.

Some buckle devices having a lock structure are provided with a lock pin for holding the lock plate in engagement with the tongue plate. The lock pin is movable between a lock position where the lock plate is held in the tongue plate engagement state and a release position where the lock plate is released from the tongue plate engagement state, and the lock pin is movable when the lock plate is engaged with the tongue plate. When the tongue plate is released, the tongue plate is located at the release position, and has the advantage that the engagement force with the tongue plate can be set high, and the tongue plate disengagement force can be set low.

In this type of buckle device with a lock structure, the area around the lock plate that engages with the tongue plate is bent into a substantially U-shape, and one parallel portion of the pair of parallel portions is parallel to the tongue plate. The lock pin corresponds to a portion substantially perpendicular to the tongue plate engaging portion and holds the lock plate in the tongue plate engaged state.

However, in the case of a buckle device having such a structure, the lock plate is bent by a press and the corners of the U-shaped portion become rounded, so the lock pin does not fit into the corner of the U-shaped portion. The lock plate may be engaged with the tongue plate in a corresponding state, and the lock plate may be engaged with the tongue plate in an unstable state.

[Problems to be solved by the invention] Taking the above facts into consideration, the present invention has a structure in which a locking member such as a locking plate is held in a state of engagement with a tongue plate by a locking auxiliary member such as a locking pin, and the locking member is The object is to obtain a buckling device which cannot be engaged with the tongue plate in an unstable manner.

[Means for Solving the Problems] The buckle device according to the present invention is a buckle device used in a seat belt device and into which a tongue plate is inserted and engaged, and the swing shaft portion is located on the base end side. At the same time, an engaging portion is formed on the distal end side, and by being swung around the swinging shaft portion, the distal end side is moved in a direction substantially perpendicular to the insertion direction of the tongue plate, and the engaging portion penetrates the tongue plate. a lock member that can be fitted into the tongue plate; a lock position that holds the lock member in a tongue plate engagement state where the engagement portion is fitted into the tongue plate; A locking auxiliary member is movably provided between the engaged state and the release position where the locking member can be disengaged, and the locking auxiliary member is located between the swinging shaft portion and the engaging portion so as to protrude from a portion on the swinging shaft side. It constitutes a part of the locking member, and has a sharp edge at the end closer to the swing shaft, and comes into contact with the locking auxiliary member in a tongue plate engagement state to guide the locking auxiliary member to the locking position. a positioning member that is movable along the insertion direction of the tongue plate, and that, when the tongue plate is moved in the insertion direction, comes into contact with the lock auxiliary member in the lock position and releases the lock auxiliary member. A release member that moves to a position and contacts the lock member to swing the lock member around the swing shaft portion.

[Function] When the tongue plate is inserted into the buckle device, the locking member is swung around the swing shaft as the tongue plate is inserted into the buckle device, thereby changing the direction of insertion of the tongue plate. The distal end of the locking member moves in a substantially perpendicular direction, allowing the engaging portion to pass through the tongue plate and fit into the tongue plate.

Then, the lock assisting member is guided to the locking position in which the locking member is held in the tongue plate engaged state in which the engaging portion is fitted into the tongue plate while being in contact with the positioning member.

When detaching the tongue plate from the buckling device, the release member is moved in the insertion direction of the tongue plate, so that the release member comes into contact with the lock auxiliary member in the lock position, and the lock member can be disengaged from the tongue plate engagement state. As the release member moves to the release position, the release member comes into contact with the lock member, causing the lock member to swing around the swing shaft.

Therefore, since the lock member swings around the swing shaft, the frictional resistance when the tongue plate is released is reduced.

In addition, when moving the locking auxiliary member from the locking position to the release position, the locking auxiliary member passes over the protruding positioning member, and then passes over the end of the positioning member closer to the swing shaft. to the release position.

On the other hand, when moving the lock auxiliary member from the release position to the lock position, the end of the protruding positioning member closer to the swing shaft is a sharp edge, so the lock auxiliary member stops at this part. The locking member is reliably guided to the locking position by the positioning member without any movement, and the locking member is not engaged with the tongue plate in an unstable state as in the conventional case.

[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 into and engaged with the buckle device 10.

In the buckle device 10, as shown in FIG. 1, a buckle body 18 is disposed between an upper cover 14 and a lower cover 16. As shown in FIG. 3, this buckle main body 18 has a pair of leg plates 24 bent on both sides of the flat plate part 22 in the width direction, and a top cover 14 and a lower cover 16 are inserted between the pair of leg plates 24. The tongue plate 12 is inserted through an opening 25 formed between the two.

An ejector 26 and a lock plate 28 are provided between the pair of leg plates 24 of the buckle body 18, as shown in FIG.

The ejector 26 is the flat plate portion 2 of the buckle body 18.
It is inserted into a guide hole 30 formed in the tongue plate 2 and is movable in the tongue plate insertion/extraction direction (directions of arrows A and B in FIGS. 1 and 2). This ejector 26 has a direction in which the tongue plate is inserted (in the first direction).
A compression coil spring 32 (shown in FIG. 3), one end of which is locked to the buckle body 18, is fitted to the end of the compression coil spring 32 (shown in FIG. 3) on the side of arrow A in FIGS. tongue plate extraction direction (first direction)
2) in the direction of arrow B in FIG.

This ejector 26 has a tongue plate 12.
When the tongue plate 12 is inserted, the tip of the tongue plate 12 comes into contact with the tongue plate 12, and the tongue plate 12 is moved from the tongue plate extracted state shown in FIG. 1 to the tongue plate insertion direction (direction of arrow A in FIG. ) as shown in FIG. 2.

The lock plate 28, which is a locking member, is inserted in the tongue plate insertion/extraction direction (arrow A in FIGS. 1 and 2).
A U-shaped portion whose longitudinal direction is in the direction B) and whose tip is bent downward at a substantially right angle at the end on the distal end side which is the tongue plate insertion direction (arrow A direction in Figs. 1 and 2). 34 is formed. This U-shaped part 3
4 has a distal end that serves as an engaging portion 38 for engaging the engaging hole 36 of the tongue plate 12, and this engaging portion 38 is inserted from the distal end into the engaging hole 36 of the tongue plate 12 as shown in FIG. It is adapted to be engaged with the tongue plate 12. An upwardly rising portion 40 is provided at the proximal end of the lock plate 28 on the side opposite to the U-shaped portion 34 in the tongue plate removal direction (in the direction of arrow B in FIGS. 1 and 2). It is formed. As shown in FIG. 3, the rising portion 40 has a wide width in the lock plate width direction, and the lock plate 28 has both ends of the rising portion 40 in the lock plate width direction supported by the pair of leg plate portions 24 of the buckle body 18. It is spanned between the leg plate parts 24.
The leg plate portion 24 has a direction in which the tongue plate is inserted (the first direction).
A substantially triangular notch 42 is formed at the end of the lock plate 28 in the direction of arrow A in FIGS. It is allowed to swing around the top portion 42A in the direction of engagement and disengagement of the tongue plate (in the directions of arrows C and D in FIGS. 1 and 2). In other words, both ends of the upright portion 40 in the lock plate width direction inserted into the notch 42 serve as swing shaft portions.

When the tongue plate is pulled out, the tip of the engaging portion 38 comes into contact with the upper surface of the ejector 26, as shown in FIG. It is said to be in a state of

As shown in FIG. 3, this lock plate 28 has a downwardly bent portion 44 formed at the longitudinally intermediate portion between the U-shaped portion 34 and the raised portion 40, and the tongue plate is removed as shown in FIG. When this bent portion 44 is pressed from the extended state in the tongue plate insertion direction (in the direction of arrow A in FIG. 1), it swings in the tongue plate engagement direction (in the direction of arrow C in FIG. 1). This bent portion 44 corresponds to the end of a block 46 integrally provided on the upper surface of the ejector 26 in the tongue plate insertion direction (direction of arrow A in FIGS. 1 and 2). When the tongue plate 12 is inserted from the tongue plate extraction state shown in FIG. While swinging in the direction of arrow C), the tongue plate is moved in the tongue plate insertion direction as shown in FIG. As the lock plate 28 swings at this time, the tip of the engaging portion 38 is fitted into the engaging hole 36 of the tongue plate 12, as shown in FIG. 2, and is engaged with the tongue plate 12.

A spring holder 48 is attached to the lock plate 28 and is locked to the upright portion 40. One ends of two compression coil springs 50 and 52 (shown in FIG. 3) are fitted into the spring holder 48. These two compression coil springs 5
The other ends of 0 and 52 (shown in FIG. 3) are closer to the tongue plate extraction direction (in the direction of arrow B in FIGS. 1 and 2) than the spring holder 48, and are fitted into the release button 54 and lock pin holder 56. combined,
The release button 54 and lock pin holder 56 are moved in the tongue plate extraction direction (direction of arrow B in FIGS. 1 and 2) by compression coil springs 50 and 52, respectively.
is energized by

The release button 54, which is a release member, is located closer to the tongue plate removal direction (arrow A direction in FIGS. 1 and 2) than the lock pin holder 56 (in the tongue plate insertion/extraction direction (arrow A direction in FIGS. 1 and 2)). A compression coil spring 50
It is movable in the tongue plate insertion direction (in the direction of arrow A in FIGS. 1 and 2) against the urging force (shown in FIG. 3). A block 58 is provided at the end of the release button 54 on the side of the tongue plate insertion direction (direction of arrow A in FIGS. 1 and 2), protruding in the direction of insertion of the tongue plate (direction of arrow A in FIGS. 1 and 2). has been done. Block 58 is lock pin holder 5
6 is movably passed through a rectangular hole 60 (shown in FIG. 3) provided at the upper end of the lock plate 28, and corresponds to the upper end of the raised portion 40 of the lock plate 28. This block 58 causes the release button 54 to move in the tongue plate insertion direction (in the direction of arrow A in FIG. 2) against the biasing force of the compression coil spring 50 (shown in FIG.
When the tongue plate is moved to the tongue plate 28, it comes into contact with the upper end of the rising part 40 of the lock plate 28 during this movement, presses the rising part 40 of the lock plate 28, and moves the lock plate 28 in the tongue plate disassembly direction (arrow D in FIG. 2). direction) while being moved in the tongue plate insertion direction. The rocking of the lock plate 28 at this time causes the engaging portion 38 to be pulled out from the engaging hole 36 of the tongue plate 12 from the tongue plate engaged state shown in FIG.

The lock pin holder 56 is a compression coil spring 52.
(shown in FIG. 3), and when the tongue plate is engaged, a lock pin 62, which is a lock auxiliary member, is inserted between the outside of the leg plate portion 24 of the buckle body 18 and the release button 54, as shown in FIG. It is designed to be held in place. The lock pin 62 is supported by the buckle body 18 with both axial ends thereof fitted into bearing holes 64 provided in the leg plate portion 24 of the buckle body 18. The bearing hole 64 is a long hole whose longitudinal direction is in the tongue plate insertion/extraction direction (arrows A and B in FIGS. 1 and 2), and supports the lock pin 62 so as to be movable in the tongue plate insertion/extraction direction. ing.

This lock pin 62 corresponds to a positioning plate portion 66 which is a positioning member provided on the lock plate 28. As shown in FIG. 3, the positioning plate portion 66 extends in the axial direction of the lock plate from an intermediate portion of the U-shaped portion 34 that is substantially perpendicular to the engaging portion 38.
Therefore, the positioning plate portion 66 is connected to the swing shaft portion and the engaging portion 3.
8, and when the tongue plate is engaged, the lock pin 62 corresponds to the upper surface as shown in FIG. 2, and when the tongue plate is extracted, the tongue plate is inserted as shown in FIG. A lock pin 62 is adapted to correspond to the end surface of the peripheral edge in the direction (direction of arrow A in FIG. 1).
More specifically, when the tongue plate is engaged, the lock pin 62 is held between the lock pin holder 56 and the release button 54 and corresponds to the upper surface of the positioning plate 66, as shown in FIG.
When the lock pin 62 is in contact with the upper surface of the positioning plate portion 66, the lock plate 28 is prevented from swinging in the tongue plate disengagement direction (direction of arrow D in FIG. 2) by the lock pin 62. From this tongue plate engagement state, the release button 54 is moved in the tongue plate insertion direction (direction of arrow A in FIG. 2), the lock pin 62 is moved together with the release button 54 in the tongue plate insertion direction, and the positioning plate portion 66 is inserted into the tongue plate. When the lock plate 28 is positioned on the tongue plate insertion direction side with respect to the peripheral edge end face on the tongue plate insertion direction side, the lock plate 28 can swing in the tongue plate release direction (in the direction of arrow D in FIG. 2), and the movement of the release button 54 causes the lock plate 2
8 is swung in the tongue plate disengagement direction, the lock pin 62 is held between the positioning plate part 66 and the lock pin holder 56, and corresponds to the peripheral edge end surface of the positioning plate part 66 on the tongue plate insertion direction side. be done.

The positioning plate portion 66 is formed by punching from the lower side of the lock plate using a press, the end surface of the peripheral edge is a cut surface, and the corresponding portion 66A with the lock pin 62 is a sharp edge.
Even if the corners of the positioning plate part 6 are rounded, the lock pin 62 is guided by the sharp edge part.
6, and move the tongue plate of the lock plate 28 in the tongue plate dissociation direction (the first
It is designed to stably prevent swinging in the direction of arrow D in FIGS. 2 and 2.

Next, the operation of this embodiment will be explained.

Illustrated in FIG. 1 is a buckling device 10.
In this state, the tongue plate 12 is not engaged. When the tongue plate 12 is inserted into the buckle device 10 in this state, the tip of the tongue plate 12 comes into contact with the ejector 26 and the ejector 26
is pressed against the biasing force of the compression coil spring 32 in the tongue plate insertion direction (direction of arrow A in FIG. 1). The tongue plate 12 is moved in the tongue plate insertion direction while moving the ejector 26 in the tongue plate insertion direction (in the direction of arrow A in FIG. 1).
During this movement, the ejector 26 comes into contact with the bent portion 44 of the lock plate 28 and locks the lock plate 2.
8 in the tongue plate insertion direction (first
Press in the direction of arrow A in the figure. The ejector 26 is moved in the tongue plate insertion direction (arrow A direction in Figure 1) while swinging the lock plate 28 in the tongue plate engagement direction (arrow C direction in Figure 1), and the tongue plate 12 is moved in the tongue plate insertion direction. When the lock plate 28 is moved, the engaging portion 38 of the lock plate 28 is fitted into the engaging hole 36. At this time, lock plate 28
By this movement, the lock pin 62 is made movable in the tongue plate extraction direction (in the direction of arrow B in FIG. 1), and is urged by the compression coil spring 52 via the lock pin holder 56 to move in the tongue plate extraction direction. When the engaging portion 38 of the lock plate 28 is fitted into the engaging hole 36 of the tongue plate 12,
It is held between the lock pin holder 56 and the release button 54 and corresponds to the upper surface of the positioning plate section 66. This state is the tongue plate engagement state shown in FIG.

Therefore, in the tongue plate engaged state shown in FIG. 2, the lock plate 28 is moved in the tongue plate disengagement direction (the second The engaging portion 38 of the lock plate 28 is prevented from swinging in the direction of arrow D in the figure.
The tongue plate 12 will not come off from the engagement hole 36 of the tongue plate 12, and the tongue plate 12 will not come off inadvertently from the buckle device 10.

Further, in a state where the lock pin 62 corresponds to the upper surface of the positioning plate part 66 by the positioning plate part 66, rocking of the lock plate 28 in the tongue plate disengagement direction (direction of arrow D in FIG. 2) is stably prevented. Therefore, the lock plate 28 is not engaged with the tongue plate 12 in an unstable state.

When detaching the tongue plate 12 from the buckling device 10, the occupant presses the release button 54 in the tongue plate insertion direction (in the direction of arrow A in FIG. ). The release button 54 contacts the lock pin 62 with the lock pin 62 sandwiched between the lock pin holder 56 and the lock pin 62 and the lock pin holder 56 against the urging force of the compression coil spring 52 (shown in FIG. 3). The tongue plate is moved in the tongue plate insertion direction (direction of arrow A in FIG. 2) while being moved in the tongue plate insertion direction. This movement causes the lock pin 62 to lock onto the lock plate 2.
Block 5 of release button 54 is positioned at the release position closer to the tongue plate insertion direction (direction of arrow A in FIG. 2) than positioning plate portion 66 of 8.
8 is brought into contact with the upper end of the rising part 40 of the lock plate 28, and the release button 54 presses the rising part 40 of the lock plate 28 in the tongue plate insertion direction to move the lock plate 28 in the tongue plate disassembly direction (see the arrow in FIG. 2). D direction) and further moved in the tongue plate insertion direction. As the lock plate 28 swings at this time, the engaging portion 38 is pulled out of the engaging hole 36 of the tongue plate 12. At the same time, the ejector 26 is urged by the compression coil spring 32 and moves in the tongue plate removal direction (direction of arrow B in FIG. 2).
The tongue plate 12 is pushed outward from the buckle device 10 and returns to the state shown in FIG.

Incidentally, when the buckling device 10 is installed upright on the floor surface of the vehicle interior, the release button 54 can be easily seen directly, and the operability when detaching the tongue plate 12 from the buckling device 10 is improved.

[Effects of the invention] As explained above, in the buckle device according to the present invention, the swinging shaft portion is located on the proximal end side, the engaging portion is formed on the distal end side, and the buckle device swings around the swinging shaft portion. a locking member whose distal end side is moved in a direction substantially perpendicular to the insertion direction of the tongue plate so that the engaging portion can penetrate the tongue plate and be fitted into the tongue plate; A lock auxiliary member is provided movably between a lock position in which the lock member is held in a tongue plate engagement state in which the mating portion is inserted, and a release position in which the engagement portion is disengaged from the tongue plate engagement state. and an end portion closer to the rocking shaft portion that is located between the rocking shaft portion and the engaging portion to protrude from a portion on the rocking shaft portion side and forming a part of the locking member. a positioning member, the positioning member being a sharp edge and in contact with the locking auxiliary member in the tongue plate engagement state to guide the locking auxiliary member to the locking position; As the tongue plate moves in the insertion direction, it comes into contact with the lock auxiliary member in the lock position and moves the lock auxiliary member to the release position, and also comes into contact with the lock member and moves the lock member to the swing shaft. A release member that swings around the release member, and a structure in which the lock member is held in the state of engagement with the tongue plate by the lock auxiliary member that is reliably moved by the sharp edge, which prevents the lock member from being in an unstable state. It has an excellent effect of not being engaged with the tongue plate. moreover,
Since the locking member swings around the swinging shaft, the frictional resistance when releasing the tongue plate is reduced, and when the buckling device is installed upright on the floor of the passenger compartment, it becomes easier to see the release member directly. As a result, the operability of the buckle device is improved.

[Brief explanation of the drawing]

1 to 3 show a buckling device to which the present invention is applied, FIG. 1 is a schematic sectional view showing the tongue plate in the pulled out state, and FIG. 2 is a tongue plate in the engaged state corresponding to FIG. 1. FIG. 3 is an exploded perspective view. 10... Buckle device, 12... Tongue plate, 28... Lock plate, 38... Engaging portion,
54... Release button, 66... Positioning plate section.

Claims (1)

[Claims for Utility Model Registration] A buckle device used in a seat belt device in which a tongue plate is inserted and engaged, which has a swinging shaft portion located on the base end side and an engagement portion formed on the distal end side. Further, by being swung around the oscillating shaft portion, the distal end side is moved in a direction substantially perpendicular to the insertion direction of the tongue plate, so that the engaging portion can penetrate the tongue plate and be fitted into the tongue plate. a locking position that holds the locking member in a tongue plate engaged state in which the engaging portion is fitted into the tongue plate, and a release position that allows the engaging portion to be released from the tongue plate engaged state. a lock auxiliary member movably provided between the lock member, and a lock auxiliary member located between the swing shaft portion and the engaging portion, protruding from a portion on the swing shaft side and forming a part of the lock member; , a positioning member whose end closer to the swing shaft side is a sharp edge and which contacts the locking auxiliary member in the tongue plate engagement state and guides the locking auxiliary member to the locking position; and inserting the tongue plate. When the tongue plate moves in the insertion direction, it comes into contact with the lock auxiliary member in the lock position and moves the lock auxiliary member to the release position, and also comes into contact with the lock member. A buckle device comprising: a release member that contacts the lock member and swings the lock member around the swing shaft portion.