JPH11137310A - Buckle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buckle device with a reliability, where water, etc., is not brought into contact with a switch itself even when water is thrown in the buckle device and water, etc., intrudes from a tongue inserting port into a buckle main body and to provide excellent waterproof property SOLUTION: The device is provided with the tongue, the buckle main body where the tongue is inserted/detached and the inserted tongue is locked so as to be engagement possible and a switch 4 which is disposed in the buckle main body 10 so as to detect the engagement/detachment state of the tongue. The switch 4 is provided with a switch main body 20, a switch slider 6 being an actuator for operating the switch main body 20 and a wiring 7 connected to the switch main body 20a and a cover 5 for covering at least the switch main body 20 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buckle device, and more particularly to a buckle device for a seat belt mounted on a seat of a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, a seat belt of a vehicle such as an automobile is provided with a seat belt in order to secure occupants. The buckle device for a seat belt usually includes a tongue (tongue piece) provided at an end of the belt, and a buckle main body for engaging and disengaging the tongue.

[0003] The buckle body includes a latch plate having a latch portion for locking the tongue, a buckle base on which the latch plate is movably supported, and a buckle base that moves in accordance with the insertion and removal of the tongue. The system includes a slider for moving the plate, and a switch for detecting a state of engagement and disengagement of the tongue with respect to the buckle body.

A buckle device having such a configuration is disclosed in, for example, Japanese Utility Model Laid-Open No. 4-101611. The buckle device described in this publication is arranged so as to be slidable along the tongue insertion / removal direction of the buckle body, and is slid by the insertion of the tongue and urges the tongue in the removal / removal direction. ), A fixed plate arranged corresponding to the movement locus of the ejector and having a fixed contact attached thereto, and a switch slider arranged between the fixed plate and the ejector and having the moving contact attached. Have been. The switch slider is slidable along the fixed contact, and when the ejector moves, by engaging with the ejector and moving,
The contact state between the movable contact and the fixed contact changes.

[0005]

However, in the conventional buckle device, no consideration is given to the waterproofness of the switch. That is, for example, if the buckle device is flooded by accidentally spilling water on the buckle device,
Water may enter from the tongue insertion opening of the buckle body, and the switch may be wetted. When the switch is wetted, there is a possibility that a current-carrying failure such as a failure to switch contacts due to the conductivity of the water may occur. In addition, for example, when a drink such as juice enters the buckle main body, there is a possibility that a malfunction such as a slider (ejector) being stuck and not moving may occur.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. Even if the buckle device is wet by water and water or the like enters the buckle main body from the tongue insertion opening, a switch is provided. An object of the present invention is to provide a highly reliable buckle device having excellent waterproofness, which does not come into contact with water or the like.

[0007]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides a tongue, a buckle body for inserting and removing the tongue, and a releasably locking the inserted tongue, and a buckle body. And a switch for detecting the engagement / disengagement state of the tongue, wherein the switch comprises: a switch body, an actuator for operating the switch body, and a wiring connected to the switch body. And a buckle device having a cover covering at least the switch body.

In the buckle device having this structure, since the switch body is covered with the cover, even if the buckle device is wet and water or the like intrudes into the buckle body from the tongue insertion opening, the switch device does not have the switch body. The body is reliably waterproof. For this reason, contact of water or the like with the switch unit itself is prevented.

[0009]

Next, an embodiment according to the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is an exploded perspective view of a buckle body constituting a buckle device according to Embodiment 1 of the present invention, and FIG. 2 is a side view of a state where the buckle body shown in FIG. 1 is assembled. FIG. 3 is a cross-sectional view, and FIG. 3 is a plan view showing a state in which a switch is disposed on a lower cover of the buckle main body shown in FIG. 1 and a cover is disposed thereon. However, FIG. 3 is shown so that the arrangement of the members located under the covering cover can be understood.

The buckle device according to the first embodiment includes a tongue 5 provided at an end of a belt, and a buckle body 10 for engaging and disengaging the tongue 5.

Although the tongue is not particularly shown, a normal seat belt tongue can be used, and a locking hole is provided at one end.
A belt connection hole for connecting the belt is formed at the other end.

As shown in FIGS. 1 to 3, the buckle body 10 is provided with a lower cover 2, a board switch 4 mounted on the bottom of the lower cover 2, and a switch body 20 of the board switch 4 mounted on the lower cover 2 from above. A covering cover 5 made of resin to cover, a buckle base 11 attached to the lower cover 2 to which the covering cover 5 is attached, functioning as a frame, a slider 12 moving in accordance with insertion and removal of the tongue, and a movement of the slider 12. A buckle arm 16 that swings in response to the swing, a coil spring 13 that expands and contracts in accordance with the swing of the buckle arm 16, a latch plate 14 that locks the tongue, and a movement supported by the tip of the buckle arm 16 to move the latch plate 14. A control pin 17 for controlling, a block member 21 provided on an upper portion of the buckle base 11,
The release button 18 for releasing the lock of the tongue, a coil spring 19 for urging the release button 18 in the direction of withdrawing the tongue, and the upper cover 3 covering these members from above are provided. Note that a belt (not shown) is connected to the buckle main body 10 in the same manner as the tongue.

The lower cover 2 has two walls 61B at substantially the center thereof for defining a housing portion 60 for slidably housing the switch slider 6 of the board switch 4 described later.
And 61C are erected in parallel to the insertion / removal direction of the tongue. A wall on which the covering cover 5 is placed is provided at an end of the lower cover 2 on the side of the tongue removal direction (the direction indicated by the arrow X in FIGS. 2 and 3, this direction is hereinafter referred to as the “arrow X direction”). 61A is erected.

The walls 61B and 61C are connected to the switch body 20.
Are continuously formed on the mounting portions 64B and 64C, on which are mounted. The holes 71 opened in the cover 5 are provided between the outer wall 62B of the lower cover 2 and the receiver 64B, and between the outer wall 62C and the receiver 64C.
Pins 63B and 63C inserted into B and 71C are provided upright. On the side of the tongue insertion direction of the mounting portions 64B and 64C (the direction indicated by the arrow Y in FIGS. 2 and 3, hereinafter, this direction is referred to as the “arrow Y direction”), water or the like that has entered the buckle body 10 is Discharge holes 65B and 6 discharged outside
5C is formed. A switch body 20 to be described in detail later is provided substantially at the center of the end of the lower cover 2 in the arrow Y direction.
A wiring support portion 66 having a substantially circular shape for guiding and supporting the wiring 7 connected to the wiring 7 is formed. Further, the wiring support 66
A plurality of wiring support portions 67 for guiding and supporting the wiring 7 are formed on both sides of the wiring. Also, the wiring support 67
In the vicinity of the outer walls 62B and 62C on the arrow X side, screw holes 69B and 69C for guiding and supporting the wiring 7 and screwing screws 8B and 8C for fixing the lower cover 2 to the upper cover 3 are formed. Support 68
B and 68C are formed. Furthermore, lower cover 2
A plurality of engaging portions 59 to be engaged with the engaging portions of the upper cover 3 are formed at the end of the arrow X direction.

The board switch 4 includes a substantially U-shaped switch body 20 and a plurality of wirings 7 connected to the switch body 20.
And a switch slider 6 disposed in a space formed substantially in the center of the switch main body 20 and slidable in contact with the switch main body 20. As will be described in detail later, the board switch 4 is turned on when the switch slider 6 moves in the arrow Y direction, that is, when the tongue is locked to the buckle body 10,
It is set to be off when the lock of the tongue is released. The switch slider 6 has a substantially rectangular shape, and an inner space defining the substantially rectangular shape is a slider accommodating portion 9 for accommodating a buckle arm accommodating portion 39 of the slider 12 described later in detail.

The covering cover 5 is substantially complementary to the shape of the switch body 20, and includes the switch body 20, a part of the wiring 7,
Is formed of a resin plate having a substantially U-shape capable of covering the shape. Holes 71B and 7 through which the pins 63B and 63C respectively penetrate are provided at the end of the cover 5 in the arrow Y direction.
1C is formed. The covering cover 5 is fixed with the edge 72 on the arrow X direction side fitted to the wall 61A of the lower cover 2 and the ends of the pins 63B and 63C penetrating the holes 71B and 71C, respectively, to the covering cover 5. It is fixed by heat fusion. The inner edge 73 of the cover 5 is fixed to the walls 64B and 64C. The adhesive 74 is poured into the end of the cover 5 in the direction of the arrow Y. Thus, the cover 5 is
Since the switch main body 20 and a part of the wiring 7 are covered without covering the accommodating portion 60 accommodating the switch slider 6, there is no hindrance to the movement of the switch slider 6. The switch body 20 is covered with the cover 5 and is prevented from entering water and the like by the walls 61B and 61C, and is prevented from entering water and the like by the adhesive 74. Nothing. Therefore, it is possible to prevent the occurrence of an energization failure such as the inability to switch contacts due to the water conductivity, and the occurrence of troubles such as a malfunction of the switch slider.

The buckle base 11 comprises a bottom plate 11A and a pair of opposed side walls 11B and 1
1C. A guide piece 26 for guiding the tongue when inserting and removing the tongue is formed at the end of the bottom plate 11A in the arrow X direction. Also, the bottom plate 11A
Is provided with an opening 25 for allowing the slider 12 to slide in the directions of the arrows XY. Slightly in the direction of arrow X from the center of the side walls 11B and 11C,
L-shaped windows 33B and 33C whose both ends are movably supported are opened. On the side of the windows 33B and 33C in the direction of the arrow Y, a horizontally long window 3 in which convex portions 56B and 56C of a release button 18 described later are movably housed.
4B and 34C are formed. Further, the side wall 11B
And 11C, holes 35B and 35C are formed at the ends in the arrow Y direction of the latch plate 14 so that the protrusions 43B and 43C formed at the ends in the arrow Y direction are movably accommodated. In addition, jaws 36B and 36C are formed at the tips of the side walls 11B and 11C in the arrow X direction, with which the engaging portions 22B and 22C formed on both sides of the arrow X direction tip of the block member 21 engage. Further, the side walls 11B and 11B
The protrusions 24 formed on both sides of the end of the block member 21 in the arrow Y direction are provided on the upper surface corresponding to the windows 34B and 34C of C.
Mounting portions 37B and 37C on which B and 24C are mounted are formed. The projections 23B and 23C formed at the ends of the side walls 11B and 11C in the arrow X direction, respectively.
Is provided to prevent the tongue from moving upward.

The slider 12 has an upper plate 3 having a substantially U-shape.
8 and a buckle base 11 formed on the lower surface of the upper plate 38.
A buckle arm housing 39 housed in the slider housing 9 through the opening 25 is formed. Inside the buckle arm accommodating portion 39, a support portion 50 that supports both ends of a shaft portion 46 formed at the tip of the buckle arm 16, which will be described in detail later, is formed. The slider 12 has a buckle base 11 so that the bottom surface of the upper plate 38 can slide on the bottom plate 11A of the buckle base 11 with the buckle arm housing 39 housed in the slider housing 9 via the opening 25. Mounted on

The buckle arm 16 has a control pin 1 at the upper end.
7 is formed, and the lower end of the shaft 4 supported by the support 50 of the buckle arm housing 39 is formed at the lower end.
6 are formed. The buckle arm 16 is rotatable about a shaft 46. A spring support portion 47 for supporting one end of the coil spring 13 is formed substantially at the center of the buckle arm 16 in the direction of the arrow Y. As shown in FIG. 3 in particular, the buckle arm 16 has a support portion 48 located on the latch plate 14, and a portion below the support portion 48 is located below the latch plate 14.

An opening 40 through which a part of the buckle arm 16 penetrates is provided at substantially the center of the latch plate 14. At the approximate center of the end of the latch plate 14 in the direction of the arrow X, a latch portion 4 is inserted into the locking hole of the tongue to lock the tongue when the tongue is inserted into the buckle body 10.
1 is formed to extend downward. Support portions 43B and 43C rotatably supported by the support holes 35B and 35C of the side walls 11B and 11C are provided on both sides of the end of the latch plate 14 in the arrow Y direction. That is, the latch plate 14 rotates around the support portions 43B and 43C as a fulcrum, and moves the tongue to the locked position or the unlocked position. A spring support portion 42 that supports the other end of the coil spring 13 is formed at a substantially central portion of the opening 40 on the arrow Y side.

The block member 21 is provided to withstand pressure even if pressure is applied from the upper cover 3 side of the buckle body 10. This block member 21 is provided with engaging portions 22 formed at both ends in the arrow X direction side.
B and 22C are engaged with the jaws 36B and 36C of the buckle base 11, and the protrusions 24B and 24C formed at both ends on the arrow Y direction side are mounted on the mounting portion 3 of the buckle base 11.
The buckle base 11 is placed on 7B and 37C.
It is fixed to. A spring support portion 27 for supporting one end of the coil spring 19 is formed substantially at the center of the block member 21 on the arrow X side. An opening 28 is formed substantially at the center of the block member 21, and the buckle arm 16 is formed by the opening 28.
Is not blocked by the block member 21.

The release button 18 includes an operation section 54 having a substantially U-shaped cross section, and arms 55B and 55C extending horizontally in the arrow Y direction on both sides of the operation section 54. At the tips of the arms 55B and 55C in the arrow Y direction, convex portions 56B and 56C protruding inward are provided. The projections 56B and 56C are provided on the side walls 11B and 11B.
C slidably supported by windows 34B and 34C,
It guides the movement of the release button 18 in the directions of the arrows XY. On the inner side surface of the operation unit 54, substantially in the center,
A spring support portion 57 that supports the other end of the coil spring 19 is formed. This release button 18
It is always urged in the direction of the arrow X by the coil spring 19.

The upper cover 3 is provided above the lower cover 2 in which the above-described members are assembled. The upper cover 3 has an opening 29 formed at the end in the direction of the arrow X so that the operating portion 54 of the release button 18 can extend and retract. This opening 29 is provided with the release button 1
8 is formed in such a size that a gap can be formed with the lower surface of the tongue 8, and this gap becomes the tongue insertion / removal opening 30.
Further, the upper cover 3 is engaged with an engaging portion 59 formed on the lower cover 2 and is fixed to the lower cover 2 by screws 8B and 8C.

Next, a specific operation of the buckle device will be described.

To lock the tongue to the buckle main body 10, first, the tongue is inserted into the buckle main body 10 through the tongue insertion opening 30. At this time, the tip of the tongue moves the slider 12 in the direction of the arrow Y. With this movement, the buckle arm 16 rotates counterclockwise to compress the coil spring 13 toward the spring support 42.

This movement causes the arrow Y of the latch plate 14 to move.
The direction side is pushed up by being urged by the coil spring 13, and the support portion 48 moves the control pin 17 in a direction for holding the latch plate 14 at the tongue lock position.
The movement of the control pin 17 is such that both ends of the control pin 17 are substantially L
This is performed by moving in the character-shaped windows 33B and 33C. Specifically, both ends of the control pin 17 first move vertically along the L-shape of the windows 33B and 33C. Next, both ends of the control pin 17 pass through the corners of the windows 33B and 33C, move horizontally, stop at the locking position, and press the upper surface of the latch plate 14 near the latch portion 41. At this time, the control pins 17 are connected to the windows 33B and 3B.
Since the horizontal upper edge of 3C locks the upper plate so as not to move upward, the latch plate 14 can be securely locked.

When the control pin 17 moves, it comes into line contact with the edges of the windows 33B and 33C, so that the frictional force generated during the movement can be reduced. The control pin 17 has a support portion 48 at a substantially central portion thereof.
, Both sides of the control pin 17
The same operation is always performed in the same manner, and it is possible to prevent an inappropriate operation that causes a pseudo-latch phenomenon, such as, for example, only one side of the control pin 17 moving forward and backward.

The movement of the slider 12 causes
The switch slider 6 is moved in the direction of the arrow Y to come into contact with a contact portion of the switch main body 20, and the switch main body 20 is turned on. Thereby, for example, the warning display indicating that the seat belt is not fastened, which is displayed on the seat belt fastening confirmation display portion on the driver's seat panel, is erased, indicating that the seat belt is fastened.

By this series of operations, the latch 41
However, the tongue is inserted into the locking hole of the tongue (not shown) and the tongue is locked to the buckle body 10.

Next, when removing the tongue from the buckle body 10, the release button 18 is pushed in the direction of the arrow Y, and the projections 56B and 56C of the release button 18 are moved in the direction of the arrow Y along the windows 34B and 34C, respectively. Then, the locked state of the latch plate 14 is released.

With this operation, when the tongue is withdrawn,
The buckle arm 16 is rotated clockwise by the urging force of the coil spring 13, and the switch slider 6 and the slider 12 are moved to their original positions, that is, arrow X.
Returned to the direction. The movement of the slide switch 6 in the direction of the arrow X causes the slide switch 6 to move to the switch body 2.
The switch body 20 is turned off by moving away from the zero contact portion. As a result, a warning that the seat belt is not worn is displayed on the seat belt wearing confirmation display section.

At the same time as this operation, the control pin 17 and the latch plate 14 are returned to their original positions.

The buckle body 10 having this structure covers the switch body 20 of the board switch 4 and a part of the wiring 7 for detecting the presence or absence of the seat belt, that is, the state of the tongue being disengaged from the buckle body 10. Further, since the intrusion of water or the like is prevented by the walls 61B and 61C, and the waterproofing is performed by the adhesive 74, the switch body 20 does not get wet. Therefore, even if a drink or the like is accidentally spilled on the buckle main body 10 and the buckle main body 10 gets wet, and water or drinks enter the buckle main body 10, the water that has conventionally been generated due to the water getting wet It is possible to prevent the occurrence of problems such as poor electrical conduction due to electrical conductivity of the slider and malfunction of the slider due to drinks such as juice.

Further, since water or the like entering the buckle main body 10 is discharged to the outside through the discharge holes 65B and 65C, it is possible to minimize water or the like remaining in the buckle main body 10.

In the first embodiment, the switch body 2
0 and a part of the wiring 7 are covered with the cover 5, but the present invention is not limited to this.
0 may be covered, and most of the wiring 7 in the buckle body 10 may be covered.

Further, in the first embodiment, the case where the side of the cover cover 5 in the direction of the arrow Y is adhered to the adhesive 74 has been described. However, the present invention is not limited to this, and the adhesive may not be used. In this case, it is desirable to use a cover having a size that covers the entire switch body 20.

(Embodiment 2) Next, Embodiment 2 according to the present invention will be described with reference to the drawings. In the second embodiment, the same members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the detailed description is omitted.

FIG. 4 is a side sectional view of the buckle body according to the second embodiment. FIG. 5 is a plan view showing a state in which a switch is arranged on the lower cover of the buckle body shown in FIG. 4 and a cover is arranged thereon. FIG. However, FIG. 5 is illustrated so that the arrangement of the members located under the covering cover can be understood.

The buckle device according to the second embodiment differs from the buckle device according to the first embodiment in that a microswitch is used instead of a substrate switch.

As shown in FIGS. 4 and 5, the microswitch 80 includes a switch body 81, a plurality of wires 7 connected to the switch body 81, and actuators 83B and 83C provided on the switch body 81. It is provided with.

The switch body 81 has switch pressing portions 82B and 82C formed on the inner side surfaces thereof. The actuators 83B and 83C are configured to extend in the arrow Y direction from the end of the switch body 81 in the arrow X direction as a base point. As shown in FIG. 5, the actuators 83B and 83C are configured such that the tips in the direction of the arrow Y approach the difference, and can be urged outward by a leaf spring action. That is, the actuators 83B and 83C are the same as those in the first embodiment.
When the slider 12 moves in the direction of the arrow Y in the same operation as in the case of FIG.
To turn on the switch body 81.

The switch body 81 and the switch body 8
1 and the wiring 7 and the switch pressing portions 82B and 8
2C and a part of the actuators 83B and 83C on the base end side are covered with the cover 5 as in the first embodiment. Since the covering cover 5 covers the above-mentioned portion without covering the accommodating portion 60 for accommodating the switch slider 6, it does not hinder the movement of the switch slider 6 and switches the contacts by the water conductivity. It is possible to prevent the occurrence of an energization failure such as a failure to perform the operation or a trouble such as an operation failure of the switch slider.

Next, a specific operation of the buckle device according to the second embodiment will be described.

In order to lock the tongue to the buckle main body 10, when the tongue is inserted into the buckle main body 10 from the tongue insertion / removal opening 30, the same operation as in the first embodiment is performed.
The slider 12 moves in the arrow Y direction, and the buckle arm 1
The latch plate 14 is moved to the tongue lock position via 6.

At the same time, the movement of the slider 12 causes the slider 12 to press the actuators 83B and 83C outward, and as a result, the actuators 83B and 83C
By C, the switch pressing portions 82B and 82C are pressed, and the switch main body 81 is turned on. Thereby, for example, the warning display indicating that the seat belt is not fastened, which is displayed on the seat belt fastening confirmation display portion on the driver's seat panel, is erased, indicating that the seat belt is fastened.

By this series of operations, the latch section 41
However, the tongue is inserted into the locking hole of the tongue (not shown) and the tongue is locked to the buckle body 10.

Next, in order to remove the tongue from the buckle main body 10, the release button 18 is pushed in the direction of the arrow Y, and the slide 12 is moved in the same manner as in the first embodiment.
Moves in the direction of arrow X, and actuators 83B and 83B
C is no longer pressed, the switch pressing portions 82B and 82C are released from the actuators 83B and 83C, and the switch main body 81 is turned off. As a result, a warning that the seat belt is not worn is displayed on the seat belt wearing confirmation display section.

Simultaneously with this operation, the control pin 17 and the latch plate 14 are returned to their original positions.

The buckle device according to the second embodiment is also
Similarly to the buckle device according to the first embodiment, the buckle body 10
Even if water or drinks enter the buckle main body 10 due to the water being wet, the poor operation due to the conductivity of water or the like, or the operation of the slider due to the drink such as juice, which has conventionally occurred due to the water. Problems such as defects can be prevented from occurring.

Further, since water or the like entering the buckle main body 10 is discharged to the outside through the discharge holes 65B and 65C, it is possible to minimize water or the like remaining in the buckle main body 10.

In the second embodiment, the switch body 8
1, the connection part between the switch body 81 and the wiring 7, and the base parts of the switch pressing parts 82B and 82C and the actuators 83B and 83C are covered with the covering cover 5. However, the present invention is not limited to this. It is sufficient that at least the switch body 81 is covered, and the buckle body 10
Most of the wiring 7 inside may be covered.

Third Embodiment Next, a third embodiment according to the present invention will be described with reference to the drawings. In the third embodiment, the same members as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the detailed description is omitted.

FIG. 6 is an exploded perspective view of the buckle body constituting the buckle device according to the third embodiment.

As shown in FIG. 6, the buckle body 10 according to the third embodiment includes a lower cover 2, a board switch 4 attached to the bottom of the lower cover 2, and a switch body 20 of the board switch 4 attached to the lower cover 2. Cover 5 made of resin that covers the lower cover 2 from above, a buckle base 11 that is mounted on the lower cover 2 to which the cover 5 is mounted, and functions as a frame, a slider 112 that moves in accordance with insertion and removal of the tongue, and a slider 112. Spring 113 that moves the coil, a latch plate 14 that locks the tongue, a coil spring 115 that swings the latch plate 14, a spring shaft 116 that supports the coil spring 115, and a tip supported by the spring shaft 116. Control pin 1 for controlling movement of latch plate 14
7 and release button 18 to unlock tongue
A coil spring 19 for urging the release button 18 in the direction of withdrawing the tongue, a spring holder 120 with which the coil spring 19 contacts, and a release button 1
8 includes a rotatable weight 121 that presses the latch plate 14 in the locking direction in response to the movement of the spring 8, a spring 122 that urges the weight 121 in the rotation direction, and an upper cover 3 that covers these members from above. It is configured.

As in the first embodiment, the board switch 4, the cover 5, and the buckle base 11 are arranged on the lower cover 2.

A spring holder 120 is provided at the end of the buckle base 11 in the direction of the arrow X, and a release button 18 is provided via a coil spring 19 in the same manner as in the first embodiment. Here, a support hole 161 for supporting one end of the coil spring 19 is formed substantially in the center of the spring holder 120, and one end of the coil spring 19 is supported in the hole 161.

The slider 112 has a substantially U-shaped cross section, and has a substantially flat upper plate 137 and a lower portion 138 provided on the lower surface of the upper plate 137 and having an L-shaped cross section.
8, one end of the coil spring 113 is held. The other end of the coil spring 113
The buckle base 11 is fixed to the locking portion 145 on the bottom surface 11A. The slider 112 has an upper plate 137 having a bottom surface 11.
The lower part 138 is lowered downward (toward the lower cover 2) through the opening 25 opened in the bottom surface 11 </ b> A, and is housed in the housing part 9 of the switch slider 6. Therefore, the movement of the slider 112 causes the switch slider 6 to move.

The slider 112 is mounted on the buckle body 10.
Is pushed by the tip of the tongue inserted into the latch plate 14, and is slid in the direction of the arrow Y against the urging force of the coil spring 113, and presses the leg 162 of the latch plate 14 to
Turn counterclockwise. On the other hand, when the tongue is removed, the slider 112 is returned in the direction of the arrow X by the urging force of the coil spring 113.

The latch plate 14 has support holes 135B and 135 formed in the side walls 11B and 11C on both sides of the end in the arrow Y direction.
C and supporting parts 146B and 146C rotatably supported by C
Is protruding. That is, the latch plate 14 rotates around the support portions 146B and 146C as a fulcrum, and moves the tongue to the locked position and the unlocked position. Also, on both sides of the end of the latch plate 14 in the direction of the arrow Y, there are provided legs 162 extending downward.
As described above, the slider 112 can be pressed. Further, a contact portion 143 protruding substantially perpendicular to the rotation direction of the latch plate 14 and substantially in contact with the coil spring 115 is provided substantially at the center of the end of the latch plate 14 in the direction of the arrow Y.
Is provided. At the approximate center of the contact portion 143,
An opening 144 into which the shaft tip of the spring shaft 116 is inserted so as to be able to advance and retreat is formed.

The spring shaft 116 has a substantially L-shaped main body 150 sandwiched between the shaft 147 in the direction of the arrow Y and the hook-shaped support portion 14 for supporting the control pin 17 in the direction of the arrow X.
8 are formed. This spring shaft 116
The lower part of the main body 150 is placed on the lower side of the latch plate 14 through the opening 40 of the latch plate 14, and the control pin 17 held by the support portion 148 is located on the upper surface of the latch plate 14.
A predetermined position is moved from substantially above the latch portion 41 to near the inclined portion 42. The coil spring 115 is loosely fitted to the shaft 147, and the presence of the shaft 147 prevents the coil spring 115 from bending or breaking when expanding and contracting.

Further, the diameter of the shaft 147 from the substantially central portion in the longitudinal direction to the arrow Y side is smaller than that of the arrow X direction, and the smaller diameter portion corresponds to the opening 144 formed in the latch plate 14. Can be freely penetrated. In addition, the portion having a large diameter does not penetrate the opening 144, and together with the coil spring 115,
The contact portion 143 can be contacted. On both sides of the main body 150, there are formed convex portions 151 that can abut on the lower surface of the latch plate 14. The convex portion 151 prevents the spring shaft 116 from coming out of the latch plate 14 upward.

The weight 121 has a structure in which cam-shaped pieces 159B and 159C formed in a flange shape are provided on both end surfaces of a main body 158 having a cam-shaped cross section. Main body 158 and cam-shaped piece 159
B and 159C, these rotary shafts 1
60 is provided to extend outside the cam-like pieces 159B and 159C. The weight 121 has a rotating shaft 1
A spring 122 is provided to bias the weight 121 counterclockwise with the fulcrum 60 as a fulcrum. This weight 1
21 has both ends of the rotating shaft 160 rotatably supported by U-shaped grooves 136B and 136C of the side walls 11B and 11C.

The weight 121 thus arranged is
When the tongue is inserted, it is located above the latch plate 14 and presses the latch plate 14 in the locking direction by the urging force of the spring 122. On the other hand, when the tongue is pulled out,
It is rotated clockwise by the latch portion 41 of the latch plate 14 so that the latch plate 14 is not pressed down in the locking direction.

The lower cover 2 is basically of the first embodiment.
However, a drain hole 65A for discharging water or the like that has entered the buckle body 10 to the outside is provided with a single hole.
Only one is formed. Further, the wiring support 67 is formed in an arc shape along the shape of the wiring support 66.
Further, in order to fix the lower cover 2 to the upper cover 3, instead of the support portions 68B and 68C, the hook portion 1 is used.
68B and 169B are formed. This hook part 1
The upper cover 3 is fixed to the lower cover 2 by engaging 68B and 168C with the upper cover 3.

Next, a specific operation of the buckle device will be described.

To lock the tongue to the buckle body 10, first, the tongue is inserted into the buckle body 10.
At this time, the tip of the tongue moves the slider 112 in the direction of the arrow Y, presses both legs 162, and rotates the latch plate 14 counterclockwise about the supporting portions 146B and 146C. The movement of the slider 112 causes the coil spring 113 to be compressed.

At the same time as this operation, the spring shaft 1
16 rotates counterclockwise and the control pin 17
The latch plate 14 is urged in a direction for holding the latch plate 14 at the tongue lock position, and urges the latch plate 14 in the tongue lock direction. At this time, the spring shaft 116 advances in the locking direction of the latch plate 14 with respect to the contact portion 143, and the control pin 17
In the tang lock direction.

Since the coil spring 115 for moving the control pin 17 is supported by the spring shaft 116, the coil spring 115 does not bend or break when the control pin 17 is moved. For this reason, the guide pin 17 is connected to the coil spring 115
Is always positioned perpendicular to Furthermore, control pin 1
7 has a substantially central portion supported by a support portion 148. Therefore, both sides of the control pin 17 are always operated in the same manner, and the occurrence of a pseudo latch can be prevented.

Further, simultaneously with the above operation, the weight 121
Is rotated counterclockwise by the biasing force of the spring 122 to press the latch plate 14 in the locking direction.

At the same time, the arrow Y
By the movement in the direction, the switch body 20 is turned on, as in the first embodiment.

By this series of operations, the buckle body 1
0 locks the tongue.

Next, when removing the tongue from the buckle body 10, the release button 18 is pushed in the direction of arrow Y, and the weight 121 is rotated clockwise to
Release the pressing of 4.

At the same time, the push-back portions 66B and 66C of the release button 18 push both ends of the control pin 17 to return the control pin 17 to the unlocked position which allows the latch plate 14 to take the tongue unlocked position. . At this time, the coil spring 115 is pressed and contracted, and the control pin 17 is urged (pulled) to the non-locking position.
The tip of the shaft 147 is gradually extended from the opening 144, and the coil spring 115 urges the contact portion 143 clockwise.

When the tongue starts to be pulled out of the buckle body 10, the slider 112 is returned in the direction of the arrow X in accordance with the movement of the tongue by the urging force of the spring 113, and the buckle body 10 returns to the original position again.

The movement of the slider 112 in the direction of the arrow X moves the slide switch 6 away from the contact portion of the switch body 20, and turns off the switch body 20.

The buckle device having this structure has the same operation and effect as the buckle device according to the first embodiment.

The cover according to the present invention is of course applicable to a buckle device having another structure.

[0079]

As described above, according to the buckle device of the present invention, the switch for detecting the engagement / disengagement state of the tongue,
Since the switch body has a structure in which at least the switch body is covered with the cover, even if the buckle body is wet and water or the like enters the buckle body, it is possible to prevent the water or the like from coming into contact with the switch body. Can be. As a result, it is possible to provide a highly reliable buckle device that is prevented from being affected by water.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a buckle main body constituting a buckle device according to Embodiment 1 of the present invention.

FIG. 2 is a side sectional view showing a state where the buckle body shown in FIG. 1 is assembled.

FIG. 3 is a plan view showing a state where a switch is arranged on a lower cover of the buckle main body shown in FIG. 1 and a covering cover is arranged thereon.

FIG. 4 is a side sectional view of a buckle body according to Embodiment 2 of the present invention.

5 is a plan view showing a state in which a switch is arranged on a lower cover of the buckle main body shown in FIG. 4, and a cover is arranged thereon.

FIG. 6 is an exploded perspective view of a buckle main body constituting a buckle device according to Embodiment 3 of the present invention.

[Explanation of symbols]

 Reference Signs List 2 lower cover 3 upper cover 4 board switch 5 covering cover 6 switch slider 7 wiring 9 slider housing 10 buckle body 11 buckle base 12 slider 14 latch plate 20, 81 switch body 80 micro switch 65A, 65B, 65C discharge hole 74 resin

Claims (1)

[Claims] 1. A tongue, a buckle body into which the tongue is inserted and withdrawn, and a buckle body for releasably locking the inserted tongue, and a switch provided on the buckle body to detect an engagement / disengagement state of the tongue. Wherein the switch has a switch body, an actuator that operates the switch body, and a wiring connected to the switch body, and a cover that covers at least the switch body. Equipped buckle device.