JP5458792B2 - Buckle device for air belt and air belt device - Google Patents

Description

  The present invention relates to an air belt device in which a bag-like belt is inflated by gas from an inflator to restrain a vehicle occupant during a vehicle collision or the like, and a buckle device therefor.

  As one form of an inflatable belt device in which at least a part of a seat belt for restraining a vehicle occupant can be inflated, an inflator is provided in a buckle device and gas is supplied to the inflatable belt through a tongue. An example of this type of buckle device (Japanese Patent Laid-Open No. 11-268609 (Patent Document 1)) is shown in FIG.

  A tongue 102 is detachably attached to the buckle device 101. A shoulder belt 103 and a lap belt 104 are connected to the tongue 102. The lap belt 104 can be wound around the retractor 105. The shoulder belt 103 can be wound around the retractor 107 via a slip guide 106.

  A middle portion of the shoulder belt 103 includes an inflatable bag 108 and a webbing 109 that covers the bag.

  An inflator is provided in the tongue 102, and the gas from the inflator is introduced into the bag 108 to inflate the bag 108. A harness 110 for energizing and starting the inflator is pulled out from the buckle device 101. The buckle device 101 and the tongue 102 are provided with connectors for energization.

  The buckle device 101 is provided with an anchor member 111 extending downward. A lower portion of the anchor member 111 is attached to a seat base 113 formed of a seat frame, a slide rail, and the like by a fulcrum pin 112 and can swing.

  In Patent Document 1, the inflator is provided in the tongue 102, but in Patent Documents 2 and 3, the inflator is provided in the buckle device, and the gas from the inflator is introduced into the bag through the tongue. ing. In Patent Documents 2 and 3, the harness for energizing the inflator extends from the buckle device.

JP-A-11-268609 JP 2000-25545 A JP 2003-31439 A

  The buckle device is provided with a latch sensor for detecting that the tongue is attached. When the harness for connecting the latch sensor and the control unit is routed separately from the inflator energizing harness, handling of the harness becomes troublesome when the seat is assembled to the vehicle body.

  Further, in the conventional example of FIG. 5, since the harness 110 is pulled out from the buckle device 101 which is considerably separated from the fulcrum pin 112, when the anchor member 111 swings, the proximal end portion of the harness 110 (with the harness 110 and A large shearing force acts on the contact portion of the buckle device 101 with the outer shell.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a buckle device in which a plurality of harnesses are aligned and have good workability in assembling to a seat, and an air belt device including the buckle device.

  Another object of the present invention is to provide a buckle device in which no shearing force is applied to the proximal end portion of the harness even when the buckle device swings.

  Still another object of the present invention is to provide a buckle device in which a harness connected to an inflator in the buckle device is easily accommodated in a cover case when the buckle device is assembled.

The buckle device for an air belt according to the present invention (Claim 1) is a buckle device to which a tongue (2) to which an air belt (1) is connected is mounted, the tongue latch device (20) for latching the tongue (2 ) , An inflator (5) for supplying gas to the air belt (1) via the tongue (2) , a cover enclosing the tongue latch device (20) and the inflator (5) , and a tip of the inflator (5) ) And an inflator harness (44) extending to the outside of the cover, a latch sensor (25, 26) for detecting the latch of the tongue (2) by the tongue latch device (20 ), and a tip thereof contiguous with the latch sensor (25, 26), in the air belt buckle device having a extending therefrom in which harness sensor (27, 28) to the outside of the cover, the The Nfureta harness (44) and the sensor harness (27, 28), outside the said cover, aligned drawn, are inserted into a common tube (29), said cover, said Tanguratchi device (20) A buckle cover (18) encapsulating the inflator (5), and an inflator cover (19) coupled to the buckle cover (18), the inflator cover (19) And the buckle cover (18) are connected to each other so as to communicate with each other between the inflator cover (19) and the buckle cover (18), and the latch sensors (25, 26). ) Is arranged in the buckle cover (18), and the harnesses for sensors (27, 28) are routed in the buckle cover (18). The data harness (44) is routed from the inside of the inflator cover (19) to the buckle cover (18) through the communicating portion, and the buckle cover (18) includes the harness (27 , 28, 44) is provided with a harness lead-out opening (18a) for pulling out the buckle cover (18). The sensor harness (27, 28) and the inflator harness (44) Further, it is drawn out to the outside of the buckle cover (18) through the common harness drawing opening (18a) and is inserted into the common tube (29) .

An inflatable belt buckle device according to a second aspect of the present invention is the inflator retainer (30) for mounting the inflator (5) in the inflator cover (19) according to the first aspect, wherein the inflator retainer (30) The inflator harness (44) extends along the inflator (5) and is routed in a space formed between the inflator cover (19) and the inflator retainer (30). To do.

The buckle device for an air belt according to a third aspect of the present invention is the buckle device according to the second aspect, wherein the buckle device includes an anchor member (4) extending below the buckle cover (18) for supporting the tongue latch device (20). In the buckle cover (18), a buckle retainer (22) that is connected to the anchor member (4) and holds the tongue latch device (20) is disposed, and the inflator retainer (30) It is connected to the buckle retainer (22) through a section .

A buckle device for an air belt according to a fourth aspect of the present invention is the air belt buckle device according to the second or third aspect , wherein gas passages (21 , 41) extend in the vertical direction along the tongue latch device (20). The base end side is connected to the gas passage (21, 41), has a rod shape extending in a direction away from the gas passage (21, 41), and a squib (42) is provided on the distal end surface of the inflator (5). The squib connector (43) is attached to the squib (42), and the inflator harness (44) is connected to the squib connector (43). The inflator harness (44) is connected to the inflator retainer (30). ) And the inflator cover (19) in a loop shape .

The buckle device for an air belt according to claim 5 is the anchor according to any one of claims 1 to 4, wherein the buckle device supports the tongue latch device (20) and extends below the buckle cover (18). comprises a member (4), the bottom of the anchor member (4), the anchor member (4) and the shaft support for tiltably supported (6) is provided in the longitudinal direction, the anchor member (4 journal portion (6) or near the), it is characterized in that the tube holding portion which holds the tube (29) (51) are provided.
An inflatable belt buckle device according to a sixth aspect of the present invention is the air belt buckle device according to the fifth aspect, wherein the anchor member (4) has an extension portion (50) extending rearward in a state where the anchor member (4) extends in the vertical direction. ), And the tube holding portion (51) is provided at the rear end of the extending portion (50). The tube holding portion (51) The tube (29) is configured to be held from the buckle cover (18) in a state where the anchor member (4) extends in the vertical direction. After extending downward along the rear side of the anchor member (4), it extends rearward by being held by the tube holding part (51) at the lower part of the anchor member (4). It is characterized by being
The air belt buckle device according to claim 7 is the air belt buckle device according to claim 5 or 6, wherein the inflator cover (19) is disposed in front of the buckle cover (18), and the anchor member (4) extends in the vertical direction. In the existing state, the lower surface of the inflator cover (19) is inclined so as to be higher toward the front end side.

The air belt device of the present invention (Claim 8 ) includes such a buckle device and an air belt attached to the buckle device via a tongue.

  In the buckle device of the present invention, the inflator harness and the sensor harness are aligned and inserted into a common tube so that the harness is attached when the buckle device is assembled to the vehicle body. As a result, the assembly workability is improved.

As in Claim 2, the inflator harness, by routed in the space between the inflator retainer and said inflator cover inside the inflator cover buckle cover the harness and the harness sensor inflator from a common harness lead-opening port Can be pulled out.

As described in claim 4 , when the inflator harness connected to the squib connector is formed in a loop shape in the space, the inflator harness is prevented from being caught in the inflator cover and the buckle cover when the buckle device is assembled. Assembly workability is improved.

  In the present invention, a plurality of latch sensors are provided. Therefore, even when a plurality of sensor harnesses are routed, the workability of assembling the buckle device to the vehicle body is improved by inserting each harness into a common tube. To do.

When the tube is held at or near the shaft support portion of the anchor member as in claims 5 and 6, the stress generated at the harness base end portion when the anchor member swings is reduced.

It is a side view of the buckle device concerning an embodiment. It is a perspective view explaining the assembly | attachment operation | work of the buckle apparatus of FIG. FIG. 2 is a side view showing a partially broken cover of the buckle device of FIG. 1. It is a disassembled perspective view of the buckle apparatus of FIG. It is a perspective view of the conventional buckle apparatus.

  The embodiment will be described below with reference to FIGS.

  As shown in FIG. 3, the buckle device includes an air belt 1, a tongue 2 attached to the tip of the air belt 1, a buckle device 3 to which the tongue 2 is attached and detached, and the buckle device 3, and extends downward. The anchor member 4 and the inflator 5 for inflating the air belt 1 are provided.

  The anchor member 4 is swingably attached to a bracket 7 (FIGS. 1 and 2) of a seat frame via a support shaft pin 6.

  The air belt 1 includes a bag 8 that is folded into a belt shape and a mesh cover 9 that encloses the bag 8. The mesh cover 9 is stretched flexibly in the diameter-expanding direction, but is heated and stretched so as not to extend in the longitudinal direction. The front end of the air belt 1 is connected to the buckle 2, and normal webbing (not shown) is connected to the rear end in the same manner as in FIG. The normal webbing is connected to a retractor (not shown) so as to be wound. The air belt 1 may constitute a shoulder webbing or may constitute a lap webbing. The air belt 1 may be provided with a protective mesh cover or a decorative cover that further covers the mesh cover 9.

  The tongue 2 includes a tongue plate 10, a nozzle 11, and a tongue housing 12 that encloses these proximal ends. The tongue plate 10 is provided with an opening 10a on the tip side thereof, and is inserted into the insertion port 14 (FIG. 2) of the buckle device 3 to be latched. A mesh cover 9 is connected to the base end side of the tongue plate 10, and the tensile force applied to the air belt 1 is borne by the mesh cover 9.

  The nozzle 11 is held by the tongue plate 10. The tip of the nozzle 11 is connected to the gas outlet 15 of the buckle device 3 when the tongue 2 is attached to the buckle device 3. The tip of the bag 8 is connected to the rear end of the nozzle 11.

  The buckle device 3 includes a buckle cover 18 and an inflator cover 19, a tongue latch device 20 disposed in the buckle cover 18, a gas duct member 21, and a buckle retainer 22 to which these devices 20 and 21 are fixed (see FIG. 3). ) Etc.

  The buckle retainer 22 is connected to the anchor member 4 via a connecting plate 23 (FIGS. 1 and 3).

  The tongue latch device 20 includes a latch plate (not shown) that enters the opening 10a of the tongue plate 10, a spring (not shown) that urges the latch plate in the entering direction, and for retracting the latch plate from the opening 10a. A press button 24 (FIG. 2) and a return spring (not shown) that urges the inserted tongue plate 10 in a direction to push it back are provided. A known device can be used as the tongue latch device 20.

In this embodiment, as shown in FIG. 3, the proximity of the metal latch plate 10 and the first latch sensor 25 comprising a limit switch that senses the mounting of the tongue plate 10 by sensing the movement of the latch plate is sensed. In addition, a magnetically sensitive second latch sensor 26 such as a Hall element that detects attachment of the tongue plate 10 is provided. The detection signals of these sensors 25 and 26 are output to a control unit (not shown) via harnesses 27 and 28. Harness 27 is drawn out buckle cover 18 through the harness lead-opening port 18a provided in the lower part of the buckle cover 18, it is inserted into the tube 29.

  An inflator retainer 30 shown in FIG. 4 is attached to the buckle retainer 22. The inflator 5 has a cylindrical shape, and is held by the inflator retainer 30 by a C-shaped portion 31 provided in the inflator retainer 30. The inflator retainer 30 has a pair of plate portions 32 and 33 extending in the longitudinal direction of the inflator 5 along the inflator 5, and these plate portions 32 and 33 are connected by a C-shaped portion 31. . The inflator 5 is fixed to the inflator retainer 30 via the C-shaped part 31 by passing the inflator 5 through the C-shaped part 31 and fastening the plates 32 and 33 with bolts 34. Reference numeral 35 denotes a fastening hole for fixing the inflator retainer 30 to the buckle retainer 22 with bolts, rivets or the like.

  As described above, the inflator 5 has a cylindrical shape, and includes a gas ejection port 40 on the base end side. The gas outlet 40 is connected to the gas duct member 21 via an elbow pipe 41 (FIG. 3). The gas duct member 21 is held by the buckle retainer 22.

A squib 42 is provided on the tip surface of the cylindrical inflator 5, and a connector 43 is attached to the squib 42. An inflator harness 44 is connected to the squib connector 43. The inflator harness 44 passes through the space between the plate portion 32 of the inflator retainer 30 and the inflator cover 19 and further passes through the buckle cover 18 to the harness extraction opening 18a. At the same time, it is inserted into the tube 29.

  The inflator cover 19 includes a cylindrical portion 19a that is fitted on the columnar inflator 5, an end portion 19b that closes the tip of the cylindrical portion 19a, a first bulging portion 19c that extends along the cylindrical portion 19a, and a first bulging portion 19c. Two bulging portions 19d and a proximal-side protruding piece 19e are provided. The first bulging portion 19c is provided on the distal end side of the cylindrical portion 19a, and the harness 44 is accommodated therein. The second bulging portion 19 d continues from the first bulging portion 19 c and extends to the base end of the inflator cover 19. In the second bulging portion 19d, the plate portions 32 and 33 of the inflator retainer 30 and the harness 44 routed along the same are accommodated.

  The squib connector 43 is inserted into the squib 42 from the front of the inflator 5 as shown in FIG. Therefore, after the squib connector 43 is attached to the squib 42, the harness 44 is slackened. That is, the harness 44 extends to the front of the inflator 5 when the squib connector 43 is positioned in front of the squib 42 as shown in FIG. When the squib connector 43 is retracted and attached to the squib 42, the harness 44 is slackened by the amount of retraction of the squib connector 43.

  In order to prevent the slack portion of the harness 44 from being caught in a narrow gap between the inflator cover 19 and the retainer 30 when the inflator cover 19 is attached, a loop portion is provided in the middle of the harness 44 as shown in FIG. 44 a is formed, and the loop portion 44 a is made to run along the plate portion 32. Thereby, the inflator cover 19 can be smoothly fitted to the inflator 5. After the inflator cover 19 is fitted on the inflator 5 and attached, the projecting piece 19 e of the inflator cover 19 is fixed to the buckle cover 18.

As described above, the harnesses 27, 28, and 44 are led out of the buckle cover 18 from the harness pull-out opening 18 a of the buckle cover 18, inserted into the tube 29, and routed to a control unit (not shown). In the middle of this, the tube 29 is routed in the vicinity of the support shaft pin 6 below the anchor member 4. A tube holding portion 51 is provided at the lower end of the anchor member 4 via an extending portion 50 extending to the side. The tube holding portion 51 is connected to the tube via a fastening member 52 (FIG. 2). 29 is fastened.

  In the buckle device configured as described above, since the harnesses 27, 28, and 44 are inserted through the common tube 29, the workability of assembling the buckle device to the seat is good.

The tube 29 is fastened to the tube holding part 51. Therefore, between the holding portion 51 and the harness extraction opening 18a of the tube 29, the relative positional relationship anchoring member 4 is relative to the anchor member 4 and the buckle device be tilted in θ direction of FIG. 1 is unchanged Yes, no stress is generated in the harnesses 27, 28, 44 near the harness lead-out opening 18a.

  Further, the holding portion 51 of the tube 29 is positioned in the immediate vicinity of the support pin 6, and the distance r between the support pin 6 and the holding portion 51 is small. Therefore, even if the anchor member 4 tilts in the θ direction of FIG. 1, the moving distance r · θ of the holding portion 51 is small. Therefore, even if the anchor member 4 swings, the displacement of the tube 29 beyond the holding portion 51 (the side of the tube 29 farther from the buckle device 3 than the holding portion 51) is very small.

  In this embodiment, the harness 44 is routed in the space between the plate surface 32 of the plate portion 32 of the inflator retainer 30 and the inflator cover 19 in the inflator cover 19, and the slackness of the harness 44 is caused by the loop 44a. Therefore, when the inflator cover 19 is externally fitted to the inflator 5, the harness 44 does not get in the way, and the workability of mounting the inflator cover 19 is improved.

  The above-described embodiment is an example of the present invention, and the present invention may be configured other than the above. For example, the tube holding part 51 may be provided directly on the anchor member 4 without using the extension part 50.

Reference Signs List 1 air belt 2 tongue 3 buckle device 4 anchor member 5 inflator 6 spindle pin 8 bag 9 mesh cover 10 tongue plate 11 nozzle 18 buckle cover
18a Harness drawer opening 19 Inflator cover 20 Tongue latch device 21 Gas duct member 25 First latch sensor 26 Second latch sensor 27, 28 Harness 29 Tube 30 Inflator retainer 42 Squib 43 Squib connector 44 Harness 44a Loop part 51 Tube holding part

Claims (8)

A buckle device to which a tongue (2) to which an air belt (1) is connected is mounted,
A tongue latch device (20) for latching the tongue (2) ;
An inflator (5) for supplying gas to the air belt (1) via the tongue (2) ;
A cover enclosing the tongue latch device (20) and the inflator (5) ;
An inflator harness (44) having a tip connected to the inflator (5) and extending to the outside of the cover;
Latch sensors (25, 26) for detecting the latch of the tongue (2 ) by the tongue latch device (20) ;
In the buckle device for an air belt, the tip of which is connected to the latch sensor (25, 26) and having a sensor harness (27, 28) extending to the outside of the cover,
The inflator harness (44) and the sensor harness (27, 28) are aligned outside the cover and inserted into the common tube (29) .
The cover includes a buckle cover (18) enclosing the tongue latch device (20) and an inflator cover (19) enclosing the inflator (5) and connected to the buckle cover (18). Has
In the connection portion between the inflator cover (19) and the buckle cover (18), a communication portion is formed in which the inside of the inflator cover (19) and the inside of the buckle cover (18) communicate with each other.
The latch sensors (25, 26) are arranged in the buckle cover (18), the sensor harnesses (27, 28) are routed in the buckle cover (18),
The inflator harness (44) is routed from the inside of the inflator cover (19) into the buckle cover (18) through the communication portion,
The buckle cover (18) is provided with a harness pull-out opening (18a) for pulling out the harness (27, 28, 44) to the outside of the buckle cover (18).
The sensor harness (27, 28) and the inflator harness (44) are drawn out of the buckle cover (18) through the common harness pull-out opening (18a), and the common tube ( 29) A buckle device for an air belt, which is inserted into the air belt. The inflator retainer (30) for attaching the inflator (5 ) is disposed in the inflator cover (19) according to claim 1,
The inflator retainer (30) extends along the inflator (5) , and the inflator harness (44) is routed in a space formed between the inflator cover (19) and the inflator retainer (30). A buckle device for an air belt . In Claim 2, the buckle device comprises an anchor member (4) extending below the buckle cover (18) for supporting the tongue latch device (20),
A buckle retainer (22) that is connected to the anchor member (4) and holds the tongue latch device (20) is disposed in the buckle cover (18),
The inflator retainer (30) is connected to the buckle retainer (22) through the communication portion, and the buckle device for an air belt is characterized in that In Claim 2 or 3 , gas passages (21 , 41 ) are extended up and down along the tongue latch device (20) ,
It said inflator (5) is the base end side is connected to the gas passage (21, 41) is a rod-shaped extending in a direction away from the gas passage (21, 41),
A squib (42) is provided on the tip surface of the inflator (5) , a squib connector (43) is attached to the squib (42) , and the inflator harness (44) is connected to the squib connector (43). And
The inflator harness (44), the air belt buckle apparatus characterized by has a loop shape in the space between the inflator retainer (30) and inflator cover (19). The buckle device according to any one of claims 1 to 4, comprising an anchor member (4) extending below the buckle cover (18) for supporting the tongue latch device (20) .
The bottom of the anchor member (4), and shaft support (6) is provided for tiltably supporting the anchor member (4) in the longitudinal direction,
A buckle device for an air belt , wherein a tube holding portion (51) holding the tube (29 ) is provided at or near the shaft support portion ( 6 ) of the anchor member (4) . In Claim 5, the extension part (50) extended in back in the state which this anchor member (4) extended in the up-down direction was provided in the lower part of the said anchor member (4), and this extension The tube holding part (51) is provided at the rear end of the part (50), and the tube holding part (51) is configured such that a part of the tube (29) extends rearward. Configured to hold,
In a state where the anchor member (4) extends vertically, the tube (29) extends downward from the buckle cover (18) along the rear side of the anchor member (4), and then A buckle device for an air belt, which extends toward the rear by being held by the tube holding portion (51) at a lower portion of the anchor member (4). In claim 5 or 6, the inflator cover (19) is disposed in front of the buckle cover (18),
In the state where the anchor member (4) extends in the vertical direction, the lower surface of the inflator cover (19) is inclined so as to be higher toward the front end side. A buckle device according to any one of claims 1 to 7 ,
An air belt attached to the buckle device via a tongue;
An inflatable belt device.

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