JP2013082281A - Mounting part structure of air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-manufacture structure of a locking body for mounting an air bag device, while maintaining required elasticity when the air bag is mounted, capable of preventing abnormal noise from being generated due to contact with other members.SOLUTION: The mounting part structure of the air bag device includes a center member as an example of a first fixing member provided on the side of a steering wheel, and the air bag device having a mounting plate as an example of a second fixing member. A mounting member is formed to protrude on one of the center member and the mounting plate, while a locking body 60 is disposed on the other one. The locking body 60 includes a straight part 61 where the mounting member can be locked, a fixed end 62b, and a circular arc bent part 62a interposed between the straight part 61 and the fixed end 62b. The locking body 60 is covered with a resin covering part 64 formed by integrating a straight covering portion 65, a fixed covering part 66, and a bent covering portion 67.

Description

  The present invention relates to a technique for attaching an airbag device to a steering wheel.

  2. Description of the Related Art Conventionally, as a configuration for attaching an airbag device to a steering wheel, a configuration has been proposed in which a pin protruding from one side of the steering wheel and the airbag device is locked to a spring provided on the other side. Patent Documents 1 and 2 disclose the spring mounting structure.

  In Patent Document 1, a locking body formed of an elastic metal wire is held and retained by a retaining portion formed on a holding member.

  In Patent Document 2, a locking body formed of a metal wire is held by an attachment piece formed on a base plate. A resin-engaged piece body is formed by insert molding or the like at a position corresponding to the hook piece protruding from the boss plate in the locking body.

JP 2002-12112 A JP 2010-83243 A

  However, in the technique disclosed in Patent Document 1, since the retaining portion is in direct contact with a locking body formed of an elastic metal wire, abnormal noise is likely to occur due to vibration or the like.

  Further, even with the technique disclosed in Patent Document 2, abnormal noise is likely to be generated due to vibration or the like at a contact portion between a locking body and a mounting piece formed of a metal wire. In addition, it is troublesome to form resin parts for each contact portion with respect to the locking body. However, if the entire locking body is covered with resin, there is a possibility that the elasticity required for locking the pin cannot be obtained.

  Therefore, the present invention can easily manufacture a structure that can suppress the generation of abnormal noise due to contact with other members while maintaining the elasticity necessary for attaching the airbag device, with respect to the locking device for attaching the airbag device. The purpose is to do.

  In order to solve the above-described problem, a first aspect is an airbag device mounting portion structure for mounting an airbag device to a steering wheel, the first fixing member provided on the steering wheel side, an airbag, An airbag device including an inflator capable of inflating and deploying the airbag, a cover covering the folded airbag, and a second fixing member to which the airbag, the inflator and the cover are fixed. A locking member is provided with a mounting member projecting on one side of the first fixing member and the second fixing member, and the mounting member can be locked on the other side of the second fixing member and the second fixing member. And a locking body support portion for supporting the locking body, the locking body including a linear portion that can be locked by the mounting member, a fixed end portion, the linear portion and the fixed portion. edge The locking body support portion has a fixing portion capable of fixing the fixed end portion, and the fixed end portion is fixed by the fixing portion, A linear portion is disposed at a position where the mounting member can be locked, and the locking body includes a linear covering portion that covers at least a portion of the linear portion where the mounting member is locked, and the fixed end. A resin-coated portion in which a fixed covering portion that covers at least a portion that is fixed by the fixing portion and a bending covering portion that covers at least a part of the bending portion in a manner in which the bending portion can be bent is formed integrally. Covered by.

  A second aspect is an attachment structure of an airbag device according to the first aspect, wherein a covering region in the circumferential direction of the locking body by the resin covering portion is a portion where the mounting member is locked and The bending covering portion is smaller than the portion supported by the locking body support portion.

  A third aspect is an attachment structure of an airbag device according to the second aspect, wherein the bent covering portion is formed so as to cover a portion excluding the outer peripheral side of the bent portion, and the linear covering portion and The fixed portion covering portion is formed so that the linear portion and the fixed end portion can be inserted and fitted from the front end side.

  A 4th aspect is an attachment part structure of the airbag apparatus which concerns on any one 1st-3rd aspect, Comprising: The thickness of the said resin coating part is the part which the said attachment member latches, and the said latching The bent portion is smaller than the portion supported by the body support portion.

  A 5th aspect is an attachment part structure of the airbag apparatus which concerns on any one 1st-4th aspect, Comprising: On the said other side of the said 2nd fixing member and the said 2nd fixing member, the said attachment member An attachment hole is formed, and the locking body support portion has a pair of insertion holes formed so as to sandwich the attachment hole, and the fixing portion adjacent to the attachment hole, In a state where the linear portion of the locking body is disposed at a position passing through the pair of insertion holes and across the mounting hole, the fixed end portion is fixed to the fixing portion, and the resin coating portion is Of the linear portion, the portion passing through the pair of insertion holes is also covered.

  A sixth aspect is an airbag device attachment structure according to any one of the first to fifth aspects, wherein the fixed end is in contact with the fixed portion and contacts the fixed portion. Positioning protrusions for positioning the portions in the longitudinal direction are formed.

  According to the mounting structure of the airbag device according to the first aspect, the locking body includes a linear covering portion that covers at least a portion of the linear portion that the mounting member locks, and the fixed end portion. Of these, the resin coating portion has a fixed covering portion that covers at least a portion that is fixed by the fixing portion, and a bending covering portion that covers at least a part of the bending portion in such a manner that the bending portion can be bent. For this reason, it is possible to suppress the generation of noise due to the locking member for attaching the airbag device while maintaining the elasticity required when the airbag is attached to the locking member. Moreover, since the resin coating part is the structure by which the linear coating part, the fixed coating part, and the bending coating part were integrally formed, it can be set as the structure which covers a latching body easily.

  According to the 2nd aspect, since the coating area | region in the circumferential direction of the said latching body by the said resin coating part is small in the said bending part, it can be elastically deformed smoothly by the bending part of a latching body.

  According to a third aspect, the bending covering portion is formed so as to cover a portion excluding the outer peripheral side of the bending portion, and the linear covering portion and the fixing portion covering portion are the linear portion and the fixing end portion. Is formed so that it can be inserted and fitted from the front end side thereof, so that the resin covering portion can be easily attached to the engaging member by attaching the engaging member from the inner peripheral side of the bent portion of the resin covering portion.

  According to the fourth aspect, since the thickness of the resin coating portion is smaller at the bending portion than the portion where the mounting member is locked and the portion supported by the locking body support portion, Can be elastically deformed smoothly at the portion.

  According to the fifth aspect, since the resin covering portion also covers a portion of the linear portion that passes through the pair of insertion holes, it is possible to more reliably generate abnormal noise due to the locking device for attaching the airbag device. Can be suppressed.

  According to the sixth aspect, the positioning protrusion formed on the fixed end portion can position the fixed end portion in the longitudinal direction with respect to the fixed portion.

It is a disassembled perspective view which shows the steering wheel and airbag apparatus which concern on embodiment. It is a disassembled perspective view which shows a steering wheel and airbag apparatus same as the above. It is a perspective view which shows an attachment member. It is a top view which shows an attachment member. It is a side view which shows an attachment member. It is the VI-VI sectional view taken on the line of FIG. It is a rear view which shows an airbag apparatus. It is a perspective view which shows an airbag apparatus. It is a disassembled perspective view which shows an airbag apparatus. It is a rear view which shows an attachment plate and a latching body. It is the XI-XI sectional view taken on the line of FIG. It is a fragmentary perspective view which shows a mounting plate and a latching body. It is a fragmentary perspective view which shows a mounting plate and a latching body. It is a rear view which shows an attachment plate. It is a perspective view which shows a latching body. It is a perspective view which shows a latching body. It is a front view which shows a locking body. It is the XVIII-XVIII sectional view taken on the line of FIG. It is the XIX-XIX sectional view taken on the line of FIG. It is the XX-XX sectional view taken on the line of FIG. It is the XXI-XXI sectional view taken on the line of FIG. It is XXII-XXII sectional view taken on the line of FIG. It is a disassembled perspective view of a locking body. It is a disassembled perspective view of a locking body. It is explanatory drawing which shows the process of attaching a latching body to an attachment member. It is a disassembled perspective view which shows the attachment part of a steering wheel and an airbag apparatus. It is a side view which shows the attachment part of a steering wheel and an airbag apparatus. It is sectional drawing which shows the attachment part of a steering wheel and an airbag apparatus. It is sectional drawing which shows the resin coating part which concerns on a modification.

  Hereinafter, the attachment part structure of the airbag apparatus which concerns on embodiment is demonstrated. 1 and 2 are exploded perspective views showing the steering wheel 10 and the airbag device 30. FIG.

<Overall Configuration of Steering Wheel 10 and Airbag Device 30>
The attachment structure of the airbag device is a configuration for attaching the airbag device 30 to the steering wheel 10 in the vehicle. The overall configuration of the steering wheel 10 and the airbag device 30 will be schematically described.

  The steering wheel 10 is for steering the vehicle, and includes a wheel body 12, spokes 14, and a central member 16 as a first fixing member. The wheel main body 12 is formed in a ring shape and is a portion that receives a steering force by a person. The central member 16 is a fixing member provided on the steering wheel 10 side. Here, the central member 16 is configured to be connectable to a front end portion of a steering shaft that extends rearward from the front of the driver seat of the vehicle body. The spoke 14 is formed in a long shape (herein, an elongated plate shape) extending from the inner peripheral portion of the wheel main body 12 toward the center thereof, and is connected to the central member 16 at the center of the wheel main body 12. Here, three spokes 14 are provided, but two or the like may be provided. When the steering wheel 10 is rotated, the rotational motion is transmitted to the steering shaft via the spoke 14 and the central member 16. Normally, the steering wheel 10, the spoke 14 and the central member 16 are covered with an exterior member formed of resin or the like.

  A mounting member 22 projects from the central member 16. The airbag device 30 is attached and fixed to the steering wheel 10 using the attachment member 22.

  A coil spring 25 is externally fitted to the mounting member 22. The airbag device 30 is urged by the coil spring 25 in a direction away from the central member 16.

  The airbag device 30 includes an airbag 32, an inflator 34, a cover 36, a mounting plate 40 that is a second fixing member, and a locking body 60.

  The airbag 32 is formed in a bag shape with cloth or the like, and is folded so as to be accommodated in the cover 36.

  The inflator 34 is configured so that the airbag 32 can be inflated and deployed. Here, the inflator 34 has a short cylindrical inflator body 34a and a mounting flange 34b formed on the outer periphery of the inflator body 34a. The inflator body 34a incorporates an ignition device, a gas generating agent, and the like. And when the detection signal etc. from an impact detection part etc. are received at the time of a vehicle collision, the said ignition device will ignite a gas generating agent. As a result, the gas generating agent burns, and the gas generated by this combustion is supplied into the airbag 32. As a result, the airbag 32 is inflated and deployed toward the driver. The attachment flange 34b is formed in a plate shape extending so that the outer peripheral edge forms a square shape, and fixing holes 34c are formed at four corner portions thereof.

  The cover 36 is a member formed of resin or the like, and includes a cover main body 37 and a standing wall 38. The cover body 37 is formed in a dome shape that gently curves. A standing wall 38 surrounding the airbag 32 folded on the inner surface side of the cover main body 37 is projected. Here, the standing wall 38 is formed in a cylindrical shape, but may alternatively be formed in a rectangular tube shape or a shape that partially surrounds the airbag 32. The folded airbag 32 is accommodated in a space surrounded by the cover body 37 and the standing wall 38. The cover body 37 is formed with a tear line that is easily broken by receiving the inflating and deploying force of the airbag 32.

  The mounting plate 40 is configured to be fixed to the cover 36 in a state where the airbag 32 and the inflator 34 are mounted.

  In other words, the mounting plate 40 is formed as a plate-like member having an extent that can close the opening of the standing wall 38. Here, the mounting plate 40 includes a circular plate portion 42 having the same shape as the opening of the standing wall 38, and a peripheral wall 48 formed on the outer periphery of the circular plate portion 42. Then, with the circular plate portion 42 closing the opening of the standing wall 38, the peripheral wall 48 is externally fitted to the opening outer peripheral edge portion of the standing wall 38.

  An opening 42h is formed at the center of the circular plate portion 42, and the inflator 34 is disposed in the opening 42h.

  Further, a screw insertion hole 42c is formed on the outer periphery of the opening 42h in the circular plate portion 42, and the inflator 34 and the airbag 32 are attached as follows using the screw insertion hole 42c. That is, the sandwiching bracket 50 is disposed in the airbag 32 and around the gas inlet 32h. The sandwiching bracket 50 is a member formed of a metal plate or the like, and is here formed in a substantially rectangular plate shape. An opening 50 h in which the inflator 34 can be disposed is formed at the center of the sandwiching bracket 50. In addition, threaded portions 51 protrude from the corner portions of the sandwiching bracket 50. In a state where the sandwiching bracket 50 is disposed in the airbag 32, each screw portion 51 protrudes out of the airbag 32 through a hole formed in the airbag 32 around the gas inlet 32h. The inflator body 34a is disposed in the opening 42h of the mounting plate 40, and the mounting flange 34b is overlapped with the mounting plate 40 with the fixing hole 34c disposed at the same position as the screw insertion hole 42c. Arranged. In this state, the sandwiching bracket 50 is overlapped with the mounting plate 40 so that each screw portion 51 protrudes from the mounting plate 40 through the screw insertion hole 42c and the fixing hole 34c. Then, a nut 52 is screwed and fastened to each screw portion 51 protruding from the mounting plate 40. Thereby, the inflator 34 is attached and fixed to the attachment plate 40, and the airbag 32 is attached and fixed to the attachment plate 40 in a state where the airbag 32 is sandwiched between the sandwiching bracket 50 and the attachment plate 40. In this state, at least a part of the inflator 34 is disposed in the airbag 32.

  The cover 36 is also fixedly attached to the mounting plate 40. The mounting structure will be described later.

  The mounting plate 40 has a mounting hole 43h at a position corresponding to the mounting member 22 on the steering wheel 10 side. A locking body 60 is attached to a portion of the attachment plate 40 corresponding to each attachment hole 43h. When the airbag device 30 is pushed toward the steering wheel 10 and each mounting member 22 is inserted into the corresponding mounting hole 43h, the locking body 60 is locked to each mounting member 22, and the airbag device 30 is moved to the steering wheel. 10 can be attached.

<Configuration in which the airbag device 30 is attached to the steering wheel 10>
The configuration for attaching the airbag device 30 to the steering wheel 10 will be described more specifically.

  3 is a perspective view showing the mounting member 22, FIG. 4 is a plan view showing the mounting member 22, FIG. 5 is a side view showing the mounting member 22, and FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. FIG.

  As shown in FIGS. 1 to 6, the central member 16 of the steering wheel 10 is formed of a conductive member such as a metal, and an attachment member 22 is projected from the central member 16. Here, three attachment bases 20 are provided around the center of the central member 16, and a fixed-side contact 21 and an attachment member 22 project from each attachment base 20.

  More specifically, the mounting base 20, the fixed contact 21 and the mounting member 22 are integrally formed of a conductive member such as metal.

  The mounting base 20 is formed in a square plate shape, and a fixed side contact 21 and a mounting member 22 project from one main surface thereof. The mounting base 20 may be integrally formed with the central member 16 or may be mounted by screwing or the like.

  The fixed-side contact 21 has a shape in which a short cylindrical portion having a small diameter protrudes from the tip of the short cylindrical portion.

  The attachment member 22 has a column portion 23 and a locking projection 24. The column portion 23 is formed so as to protrude from the mounting base 20 to the front side (airbag device 30 side) of the steering wheel 10. Here, the column portion 23 is formed in a semi-cylindrical shape. A locking projection 24 projects from the tip of the column portion 23. Here, the locking protrusion 24 is formed so as to protrude toward the center side of the steering wheel 10. In addition, an inclined surface 22 a is formed at the distal end portion of the locking projection 24 on the airbag device 30 side so as to incline so that the height dimension gradually decreases toward the center of the steering wheel 10. Further, the locking projection 24 has a circular shape when viewed along the axial direction of the column portion 23.

  In addition, a coil spring 25 is externally fitted to the mounting member 22. The coil spring 25 has a body portion 26 and a locking end portion 27. The body portion 26 has an inner diameter that can be fitted onto the column portion 23, and can be stretched and deformed along the axial direction of the column portion 23 while being fitted on the column portion 23. Further, the locking end portion 27 is configured to be locked to the locking protrusion 24. Here, the locking end portion 27 is configured to be bent so that a portion extending from the end portion of the body portion 26 crosses the inner periphery of the body portion 26. However, a space through which the column portion 23 can pass is provided between the barrel portion 26 and the locking end portion 27 when viewed from the axial direction of the barrel portion 26. Therefore, the portion of the coil spring 25 where the locking end portion 27 is provided can also move along the axial direction of the column portion 23. The natural length of the coil spring 25 is longer than the length dimension between the base end portion of the attachment member 22 and the locking end portion 27, and preferably longer than the entire length of the attachment member 22.

  Then, in a state where the coil spring 25 is fitted, the locking end 27 is locked to the locking protrusion 24 from the proximal end side of the mounting member 22, so that the coil spring 25 is moved from the locking protrusion 24 to the distal end. It can be maintained in a compressed state so as not to protrude to the side.

  FIG. 7 is a rear view showing the airbag device 30, FIG. 8 is a perspective view showing the airbag device 30, and FIG. 9 is an exploded perspective view showing the airbag device 30. 8 and 9, the inflator 34 and the airbag 32 are omitted. 10 is a rear view showing the mounting plate 40 and the locking body 60, FIG. 11 is a sectional view taken along line XI-XI in FIG. 10, and FIGS. 12 and 13 are parts showing the mounting plate 40 and the locking body 60. FIG. 14 is a rear view showing the mounting plate 40. 15 and 16 are perspective views showing the locking body 60, FIG. 17 is a front view showing the locking body 60, and FIGS. 18 to 22 are sectional views of the locking body 60 shown in FIG. 23 and 24 are exploded perspective views of the locking body 60, and FIG. 25 is an explanatory view showing a process of mounting the locking body 60 to the mounting member 22.

  The mounting plate 40 is provided with each locking body support portion 44 corresponding to each mounting member 22, and the locking body 60 is supported by each locking body support portion 44.

  The locking body 60 is formed of a linear body that can be elastically deformed. More specifically, the locking body 60 is formed by bending and deforming an elastically deformable metal wire, and a linear portion 61 to which the mounting member 22 can be locked, and one end portion of the linear portion 61. It has a U-shaped part 62 that turns back from the side. The U-shaped portion 62 includes an arc-shaped bent portion 62a that is folded back so as to draw a semicircular arc, and a fixed end portion 62b that extends linearly on one end side of the arc-shaped bent portion 62a. That is, the arc-shaped bent portion 62a is interposed between the linear portion 61 and the fixed end portion 62b and connects the two. The fixed end portion 62 b is shorter than the linear portion 61 and is in a parallel state with respect to the linear portion 61. That is, the locking body 60 is formed in a J shape as a whole. It should be noted that the linear portion 61 may be slightly bent as long as it is within a range in which an attaching operation of a locking body 60 described later can be performed. Further, the fixed end portion 62b and the linear portion 61 may be inclined.

  The locking body 60 is formed in a J-shape as a whole between the fixed end 62b fixed to the mounting plate 40 and the linear portion 61 locked by the locking body 60. This is because the provision of the easy arc-shaped bent portion 62a facilitates the displacement of the linear portion 61 when the mounting member 22 is locked.

  Further, the locking body 60 is covered with a resin coating portion 64. The resin coating portion 64 includes a linear coating portion 65 that covers the linear portion 61, a fixed coating portion 66 that covers the fixed end 62b, and a bending coating portion 67 that covers the arc-shaped bending portion 62a. The linear covering portion 65, the fixed covering portion 66, and the bending covering portion 67 are integrally formed of resin so as to be bent in a J shape along the shape of the locking body 60.

  The linear covering portion 65 includes a semi-tubular portion covering the inside and both sides of the intermediate portion of the linear portion 61 and the arc-shaped bent portion 62a side, and outward of the linear portion 61 on one end side of the semi-tubular portion. It is made into the shape which has a tubular part which covers the whole outer periphery of an edge part. The attachment member 22 is engaged with the linear portion 61 and the linear covering portion 65 from the inner side with respect to the intermediate portion in the longitudinal direction of the linear portion 61, and the inner side and one side of the linear portion 61 are linear. It is covered with a covering portion 65 (see FIG. 8). Therefore, the portion of the linear portion 61 where the mounting member 22 is locked is covered with the linear covering portion 65. Then, the linear covering portion 65 is inserted into the linear covering portion 65 from the tip end side and can be fitted into the linear covering portion 65. In addition, it is only necessary that at least a portion of the linear portion where the attachment member 22 is locked is covered with the linear covering portion.

  The fixed covering portion 66 is formed in a tubular portion that covers the entire outer periphery of the fixed end portion 62b, and its outer shape is formed in a prismatic shape. When the fixed end portion 62b is inserted into a concave groove 45b (see FIG. 11 described later) of the fixed portion 45, the entire outer periphery of the fixed end portion 62b is covered with a fixed covering portion 66 (see FIG. 8 and FIG. 8). FIG. 11). For this reason, the part fixed by the fixing | fixed part 45 among the fixed end parts 62b is covered with the fixed coating | coated part 66. FIG. Then, the fixed end portion 62 b can be fitted into the linear covering portion 65 by being inserted into the fixed covering portion 66 from the tip end side. It should be noted that at least a portion of the fixed end portion 62b fixed to the fixed portion 45 only needs to be covered by the fixed covering portion 66.

  Further, a positioning projection 66 a having a contact surface 66 f facing the front end side of the fixed coating portion 66 is formed in a portion of the fixed coating portion 66 that is continuous with the bending coating portion 67. As will be described later, the positioning protrusion 66a is configured to contact the fixed portion 45 and position the fixed end 62b with respect to the fixed portion 45 in the longitudinal direction.

  Further, the bending covering portion 67 covers at least a part of the arc-shaped bent portion 62a in such a manner that the arc-shaped bent portion 62a can be bent. The bending covering portion 67 has a role of connecting the linear covering portion 65 and the fixed covering portion 66.

  In the present embodiment, the following configuration is adopted as an aspect in which the bending covering portion 67 covers the arc-shaped bending portion 62a so as to be bendable. That is, the covering region by the resin covering portion 64 in the circumferential direction of the cross-sectional shape of each portion of the locking body 60 is a portion (see FIG. 20) where the mounting member 22 is locked in the linear covering portion 65 and the fixed end 62b. The bending covering portion 67 (see FIG. 18) is set to be smaller than the portion (see FIG. 19) supported by the fixing portion 45. Here, the bending covering portion 67 is formed so as to cover only the inner peripheral side excluding the outer peripheral side of the arc-shaped bent portion 62a, more specifically, the inner peripheral side. For this reason, the bending covering portion 67 extends as a single bent plate along the inner peripheral side of the arc-shaped bent portion 62a, and it is difficult to prevent bending of the arc-shaped bent portion 62a in the inner peripheral side and outer peripheral side directions. It is like that.

  Here, a pair of sandwiching pieces 68 are extended on the extension of the linear covering portion 65 in the bending covering portion 67, and a retaining projection 68 a is projected inside the pair of sandwiching pieces 68. ing. Then, the pair of sandwiching pieces 68 sandwich the arc-shaped bent portion 62a disposed along the outer periphery of the bent covering portion 67, and the retaining projection 68a contacts the outer peripheral side of the arc-shaped bent portion 62a. It is arranged at a possible position. As a result, the arc-shaped bent portion 62a is prevented from being pulled out, so that the combined state of the locking body 60 and the resin coating portion 64 is maintained.

  The resin covering portion 64 is attached to the locking body 60 as follows. That is, the linear portion 61 is inserted into the linear covering portion 65 along the longitudinal direction, and the fixed end portion 62b is inserted into the fixed covering portion 66 along the longitudinal direction (see FIGS. 23 and 24). When the linear portion 61 and the fixed end portion 62 b are completely inserted into the linear covering portion 65 and the fixed covering portion 66, the arc-shaped bending portion 62 a is disposed on the outer periphery of the bending covering portion 67. In the middle of the insertion, the arcuate bent portion 62a is brought into contact with the retaining projection 68a, and the pair of sandwiching pieces 68 are expanded. When the arc-shaped bent portion 62a exceeds the retaining projection 68a, the arc-shaped bent portion 62a is disposed between the pair of sandwiching pieces 68, and the retaining projection 68a is the outer periphery of the arc-shaped bent portion 62a. It arrange | positions in the position which can contact | abut to the side. Thereby, the retaining body 60 is prevented from being detached from the resin coating portion 64. In this way, the resin coating portion 64 is attached to the locking body 60.

  The resin coating portion 64 plays a role of suppressing the metal portion of the locking body 60 from directly contacting the mounting member 22 and the mounting plate 40. Thereby, the abnormal noise between the latching body 60, the attachment member 22, and the attachment plate 40 by vibration etc. is suppressed. Further, the mounting member 22 and the mounting plate 40 in the normal state are maintained in an electrically insulated state, and an on / off switch configuration for leveling the horn can be incorporated.

  When the locking body 60 is pushed and attached to the locking body support portion 44 along the linear portion 61, the linear portion 61 is disposed in a position where the mounting member 22 can be locked. It is supported by the stop support part 44.

  That is, the support step portion 44 s pressed so that each portion of the circular plate portion 42 of the mounting plate 40 corresponding to the mounting member 22 of the steering wheel 10 protrudes on the opposite side of the peripheral wall 48 with respect to the peripheral portion. Is formed. An attachment hole 43h through which the attachment member 22 can be inserted is formed in the support step 44s.

  The locking body support portion 44 is provided adjacent to the pair of insertion holes 44a and 44b formed so as to sandwich the attachment hole 43h, and the attachment hole 43h, and the fixed end portion 62b of the distal end portion of the U-shaped portion 62 is provided. And a fixing portion 45 that can be inserted and fixed.

  Here, the pair of insertion holes 44a and 44b are orthogonal to the inner and outer direction of the mounting plate 40 (radial direction with respect to the center of the mounting plate 40) in the rising wall portion around the support step 44s. It is formed at a position sandwiched by the direction. Therefore, when the linear portion 61 is inserted into the pair of insertion holes 44 a and 44 b, the linear portion 61 of the locking body 60 crosses the mounting hole 43 h in a posture orthogonal to the inner and outer directions of the mounting plate 40. Arranged.

  The pair of insertion holes 44a and 44b are formed in a long hole shape in a direction intersecting with the linear portion 61 around the attachment hole 43h. Accordingly, the linear portion 61 of the locking body 60 can be displaced in the inner and outer directions of the mounting plate 40.

  As described above, the fixed portion 45 is provided at a position where the fixed end portion 62b is disposed in a state where the linear portion 61 is disposed so as to cross the mounting hole 43h. The fixing portion 45 forms an insertion hole 45a into which the fixed end portion 62b can be inserted in a part of the rising wall portion around the support step portion 44s, and positions the fixed end portion 62b inside the insertion hole 45a. It is formed by forming a possible groove 45b (see FIG. 11). The concave groove 45b extends along the longitudinal direction of the linear portion 61 arranged as described above, and the insertion hole 45a opens to the opposite side of the mounting hole 43h with respect to the concave groove 45b. .

  Then, while passing the linear portion 61 through the pair of insertion holes 44a and 44b, the fixed end portion 62b is inserted into the fixed portion 45 until the contact surface 66f of the fixed covering portion 66 contacts the peripheral edge of the insertion hole 45a. Push in (see FIG. 25). Then, the fixed end 62b is supported in a state in which the fixed end 45 is positioned in the insertion direction and the width direction. In this state, the linear portion 61 is disposed across the attachment hole 43h between the pair of insertion holes 44a and 44b. Since the linear covering portion 65 covers both side portions of the linear covering portion 65, the linear covering portion 65 also covers a portion of the linear covering portion 65 that passes through the pair of insertion holes 44a and 44b. Direct contact between the linear covering portion 65 and the peripheral portions of the pair of insertion holes 44a and 44b is suppressed.

  In addition, the positioning of the locking body 60 in the insertion direction is performed by attaching the inner peripheral portion of the U-shaped portion 62 of the locking body 60 or the tip side in the insertion direction of the locking body 60 in addition to the above configuration. You may implement | achieve by the structure etc. which press on the member provided in plate 40 grade | etc.,.

  In addition, a resin cylindrical member 54 is fitted in the mounting hole 43h. A flange portion 54a is formed on the outer periphery of one end portion of the cylindrical member 54, and one end portion of the cylindrical member 54 is fitted into the mounting hole 43h until the flange portion 54a contacts the outer periphery of the mounting hole 43h (FIG. 1). , See FIG. Further, on the outer periphery of the cylindrical member 54, an insertion groove 54b extending along the circumferential direction of the cylindrical member 54 is formed on the inner peripheral side of the pair of insertion holes 44a and 44b. It is disposed so as to cross the mounting hole 43h through the insertion groove 54b (see FIGS. 1 and 8). The cylindrical member 54 plays a role of suppressing the locking body 60 from coming into direct contact with the mounting plate 40. Thereby, the abnormal noise between the attachment member 22 and the attachment plate 40 by vibration etc. is suppressed. Further, the mounting member 22 and the mounting plate 40 in the normal state are maintained in an electrically insulated state, and an on / off switch configuration for leveling the horn can be incorporated. However, the cylindrical member 54 is not essential.

  A configuration for securing the locking body 60 to the side opposite to the insertion direction will be described.

  That is, a restriction piece insertion hole 47 h is formed in the mounting plate 40. More specifically, a restriction piece insertion hole 47h is formed at a position away from each insertion hole 45a along the peripheral direction of the mounting plate 40. Here, the restricting piece insertion hole 47h is formed in an arcuate hole shape along the peripheral edge of the circular plate portion 42 of the mounting plate 40, but this is not essential.

  A restricting piece 39 protrudes at a position corresponding to each restricting piece insertion hole 47 h in the opening side peripheral edge of the standing wall 38. The restricting piece 39 has an arcuate piece shape along the extending direction of the restricting piece insertion hole 47h, and is set to have the same length as the length of the restricting piece insertion hole 47h. But the restriction | limiting piece 39 should just be a shape which can be inserted in the restriction | limiting piece insertion hole 47h.

  Then, the opening side peripheral edge portion of the standing wall 38 is fitted into the peripheral wall 48 of the mounting plate 40, the restriction piece 39 is inserted into the restriction piece insertion hole 47h, and the other portion of the opening side peripheral edge portion of the standing wall 38 is the circular plate portion 42. It is made to contact with the inner surface. Then, the restricting piece 39 protrudes to a position on the outer peripheral side of the arcuate bent portion 62a of the locking body 60 in the mounting plate 40. As a result, the restricting piece 39 is disposed at a position where it can contact the outer peripheral side portion of the arc-shaped bent portion 62a, and at least one side in the longitudinal direction of the linear portion 61 of the locking body 60 (here, the locking portion From the side opposite to the direction in which the body 60 is inserted, the retaining body 60 is prevented from being removed.

  Further, a cover fixing piece 47ha projects from the peripheral edge of the restriction piece insertion hole 47h. Here, a cover fixing piece 47ha is projected from the longitudinal intermediate portion on the outer peripheral side of the restriction piece insertion hole 47h. Further, a cover fixing hole 39h is formed at a position corresponding to the cover fixing piece 47ha in a state where the restricting piece 39 is inserted into the restricting piece insertion hole 47h. The cover 36 and the mounting plate 40 are fixed by the cover fixing piece 47ha being disposed in the cover fixing hole 39h in a state where the restricting piece 39 is inserted into the restricting piece insertion hole 47h as described above. . In the present embodiment, in addition to the three restricting pieces 39, a cover fixing piece 39d having the same configuration as the restricting piece 39 is provided. Further, a cover fixing piece insertion hole 47d having the same configuration as that of the restriction piece insertion hole 47h is formed in the mounting plate 40 at a position corresponding to the cover fixing piece 39d (see FIGS. 7 and 8). The cover fixing piece 39d also has a role of fixing the cover 36 and the mounting plate 40. The cover 36 and the mounting plate 40 may be fixed by screwing, rivet fixing, or the like.

  Note that the position restriction of the locking body 60 in the insertion direction may be performed by a restriction piece separately provided on the standing wall 38 as described above.

  Further, it is not always necessary to restrict the position of the restricting piece 39 in a state in which the restricting piece 39 is inserted into the restricting piece insertion hole 47 h formed in the mounting plate 40. The restricting piece may protrude from the outer peripheral side of the mounting plate with respect to the mounting plate so as to position the locking body. In addition, a configuration that prevents the locking body 60 from being removed by the restriction piece 39 is not essential. The retaining member 60 may be prevented from being removed by attaching another retaining member to the attachment plate 40.

  The airbag device 30 is attached to the steering wheel 10 as follows.

  That is, the airbag device 30 is pushed toward the steering wheel 10 so that the mounting member 22 is inserted into the mounting hole 43h. Then, the inclined surface 22 a of the mounting member 22 is pressed against the linear portion 61 of the locking body 60. Thereby, the linear part 61 is bent inside the attachment member 22 centering on the U-shaped part 62 (refer FIG. 28). Further, the tip end portion of the coil spring 25 mounted on the mounting member 22 is pressed against the mounting plate 40 via the tubular member 54 and is compressed and deformed. And if the linear part 61 of the latching body 60 gets over the latching protrusion 24 of the attachment member 22, the linear part 61 of the latching body 60 will return to the position which crosses the original attachment hole 43h. Further, the mounting plate 40 and the mounting base 20 are urged away from each other by the elastic force of the coil spring 25 compressed and deformed between the mounting plate 40 and the mounting base 20. As a result, in a state where the mounting plate 40 and the mounting base 20 are biased away from each other, the locking body 60 is locked to the locking projection 24 from the base end side of the mounting member 22, and the airbag device 30 is It is attached to the steering wheel 10 (see FIGS. 26 to 27).

  In the above state, the stationary contact 21 on the mounting base 20 side is disposed at a position away from the support step 44s. When the airbag device 30 is pushed toward the steering wheel 10, the mounting plate 40 moves toward the steering wheel 10 against the urging force of the coil spring 25, and the fixed contact 21, the mounting plate 40, Touch. Thereby, the switch for a horn ringing circuit which uses the fixed side contact 21 as a contact on one side and the mounting plate 40 as a contact on the other side can be incorporated. That is, in a state where the airbag device 30 is attached to the steering wheel 10, the stationary contact 21 and the attachment plate 40 are in a non-contact state by the biasing force of the coil spring 25, and both are in a non-conductive state. Yes. When the driver pushes the cover 36 in this state, the mounting plate 40 is pushed toward the steering wheel 10 against the urging force of the coil spring 25. Thereby, it can comprise so that the fixed side contact 21 may contact the attachment plate 40 as a contact on the other side, both will be in a conduction | electrical_connection state, and a horn will sound.

  However, it is not necessary to incorporate a horn switch structure in this portion, and a horn switch may be incorporated in the surface portion of the cover 36.

  According to the mounting portion structure of the airbag device 30 configured as described above, the locking body 60 includes the linear covering portion 65 that covers at least the portion of the linear portion 61 where the mounting member 22 is locked, and the fixed end. Since it is covered with the resin coating part 64 which has the fixed coating | coated part 66 which covers at least the part fixed by the fixing | fixed part 45 among the parts 62b, the metal part of the latching body 60, the attachment member 22 or the fixing | fixed part 45, and It is possible to suppress abnormal noise caused by direct contact. Further, it is avoided that the metal portion of the locking body 60 and the mounting member 22 or the mounting plate 40 made of metal are in direct contact with each other via the locking body 60, and the two are maintained in a non-conductive state. can do. Thereby, the switch for a horn ringing circuit which uses the stationary contact 21 on the central member 16 side as a contact on one side and the attachment plate 40 as a contact on the other side can be incorporated.

  Further, since the linear covering portion 65 and the fixed covering portion 66 are integrally formed via the bending covering portion 67 and can be handled as one member, the resin covering portion 64 can be easily attached to the locking body 60. .

  In particular, in the present embodiment, the bending covering portion 67 is formed so as to cover the portion other than the outer peripheral side of the bending covering portion 67, and the linear covering portion 65 and the fixed covering portion 66 are respectively the linear portion 61 and the fixed end. Since the portion 62b is formed so that it can be inserted and fitted from the front end side, the resin cover 64 is attached to the lock 60 by attaching the lock 60 from the outer peripheral side of the bending cover portion 67 of the resin cover 64. Easy to install.

  In addition, the bending covering portion 67 of the resin covering portion 64 is an aspect in which the arc-shaped bending portion 62a can be bent. Here, the covering region in the circumferential direction of the locking body 60 is made smaller than the others. The stationary body 60 can be easily elastically deformed by the arc-shaped bent portion 62a. As a result, when the attachment member 22 is inserted into the attachment hole 43h, the locking member 60 is easily elastic so that the linear portion 61 moves to the outer peripheral side of the attachment hole 43h with the arcuate bent portion 62a as the center. Can be deformed.

  In addition, the structure of the bending coating | coated part which covers the arc-shaped bending part 62a in the aspect which can be bent is not restricted to the said example. For example, as shown in FIG. 29, the thickness dimension of the bending covering portion 67B of the resin coating portion 64B covering the arc-shaped bending portion 62a of the locking body 60 is equal to the other portion where the mounting member 22 is locked, and the fixing portion. It may be set smaller than other portions fixed by 45. FIG. 29 is a cross-sectional view corresponding to FIG. Even in this case, since the bending covering portion 67B is thin, the arc-shaped bending portion 62a can be easily elastically deformed.

  Moreover, since the resin coating | coated part 64 has also covered the part which passes a pair of insertion hole 44a, 44b among the linear parts 61, the linear part 61 of the latching body 60 and the pair of insertion holes 44a which were formed with the metal. , 44b can be more reliably suppressed from direct contact with the peripheral edge portion (which is also formed of metal), and abnormal noise generated by the locking body 60 can be more reliably suppressed.

  In addition, since the positioning projection 66a is formed in the fixed covering portion 66, the positioning of the fixed end 62b with respect to the fixing portion 45 in the longitudinal direction is caused by bringing the positioning protrusion 66a into contact with the fixing portion 45. Can be planned.

{Modification}
In the above embodiment, the mounting member 22 may be provided on the mounting plate 40 that is the second fixing member, and the locking body 60 may be supported by the central member 16 that is the first fixing member.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Steering wheel 16 Central member 22 Each attachment member 30 Airbag apparatus 32 Airbag 34 Inflator 36 Cover 40 Mounting plate 44 Locking body support part 44a, 44b Insertion hole 44s Supporting step part 45 Fixing part 60 Locking body 61 Linear part 62 U-shaped portion 62a Arc-shaped bent portion 62b Fixed end portion 64, 64B Resin coating portion 65 Linear coating portion 66 Fixed coating portion 66a Positioning projection 67, 67B Bending coating portion

Claims (6)

An airbag device mounting structure for mounting an airbag device to a steering wheel,
A first fixing member provided on the steering wheel side;
An airbag device comprising: an airbag; an inflator capable of inflating and deploying the airbag; a cover covering the folded airbag; and a second fixing member to which the airbag, the inflator and the cover are fixed. When,
With
A mounting member projects from one side of the first fixing member and the second fixing member,
On the other side of the second fixing member and the second fixing member, a locking body that can be locked by the mounting member, and a locking body support portion that supports the locking body are provided,
The locking body has a linear portion that can be locked by the mounting member, a fixed end portion, and a bent portion interposed between the linear portion and the fixed end portion,
The locking body support portion has a fixing portion capable of fixing the fixed end portion,
The fixed end portion is fixed by the fixing portion, so that the linear portion is disposed at a position where the mounting member can be locked,
A linear covering portion that covers at least a portion of the linear portion that the mounting member locks; and a fixed covering portion that covers at least a portion of the fixed end portion fixed by the fixing portion. A structure for attaching an airbag device, wherein at least a part of the bent portion is covered with a resin coating portion integrally formed with a bent covering portion that covers the bent portion in a manner that allows bending. The airbag device mounting portion structure according to claim 1,
An airbag device in which a covering region in the circumferential direction of the locking body by the resin coating portion is smaller in the bent covering portion than a portion locked by the mounting member and a portion supported by the locking body support portion. Mounting part structure. The airbag device mounting portion structure according to claim 2,
The bending covering portion is formed so as to cover a portion excluding the outer peripheral side of the bending portion,
The attachment structure of an airbag device, wherein the linear covering portion and the fixing portion covering portion are formed so that the linear portion and the fixed end portion can be inserted and fitted from the front end side. It is the attachment part structure of the airbag apparatus as described in any one of Claims 1-3,
The attachment part structure of an airbag apparatus in which the thickness of the said resin coating part is smaller in the said bending part than the part supported by the part which the said attachment member latches, and the said latching body support part. It is the attachment part structure of the airbag apparatus as described in any one of Claims 1-4,
A mounting hole through which the mounting member can be inserted is formed on the other side of the second fixing member and the second fixing member,
The locking body support portion has a pair of insertion holes formed so as to sandwich the attachment hole, and the fixing portion adjacent to the attachment hole,
In a state where the linear portion of the locking body is disposed at a position passing through the pair of insertion holes and crossing the attachment hole, the fixed end portion is fixed to the fixing portion,
The mounting part structure of an airbag apparatus which the said resin coating | cover part covers also the part which passes through a pair of said insertion hole among the said linear parts. It is the attachment part structure of the airbag apparatus as described in any one of Claims 1-5,
A mounting portion structure for an airbag device, wherein a positioning protrusion is formed on the fixed end portion to contact the fixed portion to position the fixed end portion in the longitudinal direction with respect to the fixed portion.

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