JP2017088115A - Automobile component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering wheel for which a cost of manufacture can be suppressed while preventing allophone due to rubbing between a coil spring and a hub part.SOLUTION: A module is provided with an installation part onto which one end side of a coil spring 27 is installed. A boss part 82 is provided with a support part 106 which supports the other end 27b of the coil spring 27 in such a state as to be separated from the boss part 82. Even if the module is pushed to the boss part 82 side against energization of the coil spring 27, allophone due to contact between the other end 27b of the coil spring 27 and the boss part 82 is not generated since the other end 27b of the coil spring 27 is separated from the boss part 82 by the support part 106. A process, in which anon-woven cloth is bonded to the other end 27b of the coil spring 27 and the boss part 82, is not required, whereby a cost of manufacture can be reduced.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automobile part provided with a coil spring interposed between a part body and a module.

  2. Description of the Related Art Conventionally, as a steering wheel of an automobile, that is, a steering wheel, a folded airbag is provided on a boss portion (boss core) that is a support portion constituting the steering wheel body, an inflator that supplies gas to the airbag, and the airbag and the inflator. And a base plate to which an air bag and an inflator are attached and a module such as an air bag apparatus including a cover body connected to the base plate and covering the air bag and the inflator are known.

  Such an airbag device is also used as a horn switch device for blowing the horn device. That is, a contact portion is set for each of the boss portion and the airbag device (base plate side), and the airbag device is elastically held by the coil spring with respect to the boss portion, and the airbag device is pushed into the boss portion side to thereby contact the contact portion. The horn switch device is closed when the boss portions are brought into contact with each other to be conducted, and the horn device is operated (see, for example, Patent Documents 1 and 2).

JP 2013-224100 A (page 3-6, FIG. 5) Japanese Patent Laying-Open No. 2015-36278 (page 5-13, FIG. 8-9)

  Since the coil spring is formed by winding a metal wire in a coil shape, the terminal portion has a stepped shape. Therefore, when pushing the airbag device to blow the horn device, especially the end portion of the coil spring is in direct contact with the metal boss portion, so as not to generate abnormal noise (slight rubbing sound) Steps such as placing the end portion of the coil spring on the resin or attaching a nonwoven fabric for cushioning to the boss portion are required. Therefore, it is desired to eliminate these steps and reduce the manufacturing cost.

  The present invention has been made in view of these points, and an object of the present invention is to provide an automobile component capable of suppressing manufacturing costs while preventing abnormal noise caused by contact between a coil spring and a component main body.

  An automobile component according to claim 1 comprises a component main body, a module attached to the component main body, and a coil spring interposed between the component main body and the module. One includes a mounting portion for mounting one end side of the coil spring, and the other of the component main body and the module is spaced apart from the other end of the coil spring with respect to the other of the component main body and the module. It is provided with a support portion that supports in a state of being caught.

  The automobile part according to claim 2 is the automobile part according to claim 1, wherein the mounting part includes a positioning part for positioning the other end part of the coil spring by fixing a position on one end side of the coil spring. It is.

  According to a third aspect of the present invention, in the automobile part according to the first or second aspect, the mounting portion includes a rotation preventing portion that prevents the coil spring from rotating in the circumferential direction.

  The automobile part according to claim 4 is the automobile part according to any one of claims 1 to 3, wherein the part main body is a hub portion of the handle main body of the handle.

  According to the automobile component of claim 1, even if the module is pushed into the component main body side against the bias of the coil spring, the other end of the coil spring is separated from the component main body by the support portion. No abnormal noise is generated by contact between the other end of the coil spring and the component main body. Therefore, for example, the process of sticking a nonwoven fabric on the other end part of a coil spring or a component main body becomes unnecessary, and manufacturing cost can be reduced.

  According to the automobile part of the second aspect, in addition to the effect of the automobile part of the first aspect, the other end of the coil spring whose one end is positioned by the positioning portion is fixed to the position of the one end. Therefore, by attaching the module to the component main body at a fixed position, the position of the other end of the coil spring with respect to the component main body is also fixed. For this reason, by designing in advance so that the position of the other end portion is shifted from the support portion, when the module is assembled to the component body, the other end portion of the coil spring and the support portion Positioning confirmation work is not required, the number of work steps can be reduced, and the manufacturing cost can be further reduced.

  According to the automobile part of claim 3, in addition to the effect of the automobile part of claim 1 or 2, the rotation prevention part prevents the coil spring from rotating with respect to the mounting part. Thus, it is possible to reliably prevent the coil spring from being disengaged from the mounting portion and the position of the other end portion being displaced from the position of the support portion by rotating in the circumferential direction.

  According to the automobile part of the fourth aspect, in addition to the effect of the automobile part according to any one of the first to third aspects, the part main body is a hub portion of the handle main body of the handle, so During the movement, the other end of the coil spring is not rubbed against the hub portion, so that no abnormal noise is generated.

(A) is the perspective view which expands and shows a part of component main body of the automotive component of one embodiment of this invention, (b) is a perspective view which shows the state which attached the coil spring to (a). is there. (A) is the perspective view which expands and shows other part of the component main body of an automotive component same as the above, (b) is a perspective view which shows the state which attached the coil spring to (a). (A) is a perspective view showing one mounting portion, (b) is a perspective view showing a state in which a coil spring is attached to the mounting portion in (a), and (c) is a rotation of the coil spring from the state in (b). It is a perspective view which shows the state which made it let it contact one end part to the rotation prevention part, and (d) is a partial enlarged view of (c). (A) is a perspective view showing another mounting portion, (b) is a perspective view showing a state in which a coil spring is attached to the mounting portion in (a), and (c) is a rotation of the coil spring from the state in (b). It is a perspective view which shows the state which was made to make it contact one end part with the rotation prevention part. It is sectional drawing which shows a mounting part same as the above. (A) is a plan view showing an engagement state of a hook to a wire, (b) is a cross-sectional view at the position of one mounting portion, (c) is a cross-sectional view at the position of another mounting portion, (d) FIG. 6 is a side view showing a locked state between the locking portion and the locking receiving portion. It is a top view which shows a part of automotive component same as the above. It is a disassembled perspective view of a motor vehicle part same as the above. It is a front view which shows a motor vehicle part same as the above.

  Hereinafter, the configuration of an embodiment of an automobile part of the present invention will be described with reference to FIGS.

  8 and 9, reference numeral 10 denotes a steering wheel which is a handle as an automobile part. This steering wheel 10 is arranged in front of an occupant in a driver's seat of an automobile, and the module 11 is mounted on the occupant side. A steering wheel body 12 as a handle body, a cover body 13 (FIG. 8) as a covering member attached to the opposite side of the steering wheel body 12, that is, the opposite side of the module 11, and an occupant of the steering wheel body 12. It comprises a finisher (garnish) 14 as a decorative member attached to the side.

  The steering wheel 10 is usually mounted on a steering shaft as a steering device (not shown) provided in a state inclined with respect to the horizontal direction (vertical direction). The front side or the rear side (arrow R side shown in FIG. 8), the steering shaft side is the vehicle body side, the back side or the front side (arrow F side shown in FIG. 8), and the front-rear direction along this steering shaft is the axial direction. In addition, directions such as the front-rear direction (arrows F and R directions) and the vertical direction (arrows U and D directions shown in FIG. 9 and the like) will be described with reference to the straight traveling direction of the vehicle body provided with the steering wheel 10.

  In the present embodiment, the module 11 shown in FIG. 8 includes a base plate 21 that is an attachment member as a storage body and an airbag cover 22 that is a covering body, and a case 24 in which a folded airbag 23 is stored. An airbag device (airbag module) including an inflator 25 and a retainer 26 arranged in The module 11 is held in a state of being biased by the coil spring 27 with respect to the steering wheel body 12.

  Here, the coil spring 27 is a biasing means that biases the module 11 toward the rear (occupant side) with respect to the steering wheel main body 12, and acts as a horn spring that is an open holding means of the horn switch device. The coil spring 27 is formed, for example, by winding a metal wire L (FIG. 1B) such as stainless steel in a coil shape. For this reason, the coil spring 27 is formed with one end (one end surface of the wire L) 27a and the other end (the other end surface of the wire L) 27b facing in the circumferential direction, as shown in FIG. And facing in opposite directions. Further, one end portion 27a and the other end portion 27b of the coil spring 27 protrude from the intermediate portion 27c of the coil spring 27 in steps. Further, the one end portion 27a and the other end portion 27b are shifted from each other in the circumferential direction of the coil spring 27. In this embodiment, the coil springs 27 are set in a plurality of three or more, for example, four, and are provided with a pair of upper springs 29 and a pair of lower springs 30 as shown in FIG. .

  The base plate 21 is also called a back plate, a back holder, or a housing, and also serves as a horn plate of a horn device (not shown), and is integrally injection-molded with, for example, a synthetic resin. The base plate 21 includes a substrate portion 31 that is an attachment surface portion as a case main body, and a peripheral wall portion 32 raised to the front side over the entire peripheral portion on the surface side of the substrate portion 31. .

  A circular hole-shaped inflator mounting hole 34 is opened at a substantially central portion of the substrate portion 31, and four mounting holes 35 are opened surrounding the inflator mounting hole 34. In addition, a mounting portion 37 to which one end side of the coil spring 27 is mounted is provided on the base plate portion 31 so as to project toward the back side, that is, the steering wheel main body 12 side. Further, a locking portion 38 for attaching the module 11 to the steering wheel main body 12 so as to be able to advance and retreat is provided on the base plate portion 31 so as to protrude from the back surface side. Further, a movable contact 39 (FIG. 7), which is one contact, is set on the substrate portion 31.

  The mounting portion 37 is formed in a columnar shape (columnar shape) that is substantially perpendicular to the substrate portion 31. As shown in FIG. 3B, the mounting portion 37 includes a rib 41 serving as a positioning portion for positioning the one end portion 27a of the coil spring 27, and a retaining member that presses one end side of the coil spring 27 to prevent the coil spring 27 from coming off. Part 42 (FIG. 3D). Further, the mounting portion 37 is provided with a bulging portion 43 (FIG. 5) as a rotation blocking portion that prevents the coil spring 27 from rotating in the circumferential direction. In the present embodiment, the mounting portion 37 is set to a plurality of three or more, for example, four, and as shown in FIG. 7, a pair of columnar (circular) as an engaging portion as the first mounting portion. A columnar hook 45 and a pair of pedestal portions 46 as a second mounting portion are provided.

  The rib 41 shown in FIGS. 3A and 4A is formed along the protruding direction of the mounting portion 37, that is, along the front-rear direction. The rib 41 protrudes from the outer peripheral surface of the mounting portion 37 in the radial direction. As shown in FIGS. 3 (c) and 4 (c), the rib 41 has one end portion 27a serving as an end surface on one side of the coil spring 27 attached around the mounting portion 37. The coil spring 27 is positioned in the circumferential direction by abutting along the circumferential direction from one side.

  A plurality of retaining portions 42 shown in FIGS. 3A and 4A are set in the mounting portion 37, for example. The retaining portion 42 projects in a claw shape in the radial direction from the outer peripheral surface of the mounting portion 37, and as shown in FIGS. 3 (d) and 4 (c), the vicinity of one end portion 27a of the coil spring 27 is a substrate. It is sandwiched between the part 31 side.

  The bulging portion 43 shown in FIG. 5 is formed to slightly bulge from the outer peripheral surface of the mounting portion 37 in the radial direction. That is, the bulging portion 43 is projected so as to be smoothly continuous with the virtual cylindrical surface C including the outer peripheral surface of the mounting portion 37. Further, the bulging portion 43 is located in the vicinity of the rib 41. Specifically, in the present embodiment, the bulging portion 43 is set to an angle of, for example, 20 to 90 ° with respect to the rib 41 in the circumferential direction of the coil spring 27 (mounting portion 37). The bulging portion 43 is in contact with the inner surface of one end side of the coil spring 27 attached around the mounting portion 37, that is, inscribed so as to press the one end side of the coil spring 27 radially from the inside. The coil spring 27 is prevented from rotating in the circumferential direction.

  Further, the hook 45 shown in FIG. 3C or the like not only has a function of positioning and holding one end of the coil spring 27 but also a function of attaching the module 11 shown in FIG. have. Specifically, the hook 45 has a function of detachably locking the module 11 and the steering wheel body 12, positioning the module 11 with respect to the steering wheel body 12, and guiding the module 11 along the front-rear direction. doing. As shown in FIG. 3A, these hooks 45 are provided with a cylindrical base 48 protruding from the base plate 31 at the base end, and the rib 41, A hook main body 49, which is a mounting portion main body provided with a retaining portion 42 and a bulging portion 43 (FIG. 5), is provided. Further, as shown in FIG. 6 (b), the hooks 45 are provided with a concavity 51 as a constricted hook portion on the distal end side, that is, the distal end side of the hook main body 49, and the surface on the distal end side of the concave portion 51 is A locking surface 52 is formed. Further, the tip of the hook 45 (hook body 49) is formed in a conical shape so as to gradually become narrower (reduce the diameter) toward the tip. These hooks 45 are inserted into insertion openings 54 as holes of the steering wheel main body 12 to be described later, and the engagement members are attached to the insertion openings 54 so as to be partially exposed. The wire 55 is elastically locked and held at the position of the locking surface 52 (recessed portion 51), and is movable along the front-rear direction with respect to the insertion opening 54. In the present embodiment, as shown in FIG. 7, the hooks 45 are provided on the left and right sides of the upper part of the base plate 21 (substrate part 31), that is, in the neutral (neutral) steering wheel 10 (FIG. 9). They are spaced apart from each other in the hour direction and the 3 o'clock direction.

  In this embodiment, the pedestal portion 46 shown in FIG. 7 and the like is formed so that the protruding amount from the substrate portion 31 is smaller than that of the hook 45 and the diameter dimension is smaller. These pedestals 46 are located on both sides of the locking portion 38. In other words, these pedestal portions 46 are positioned apart from each other on the left and right side portions of the lower portion of the base plate 21 (substrate portion 31). Further, these pedestal portions 46 are located closer to the central portion side of the base plate 21 (substrate portion 31) in the left-right direction than the hooks 45 are. Accordingly, the hooks 45 and the pedestals 46 are arranged so as to be located at the vertices of a virtual quadrangle (isosceles trapezoid). That is, the arrangement of the hook 45 and the pedestal 46 is symmetrical, for example.

  The locking portion 38 shown in FIG. 8 and the like is locked to a locking receiving portion 57 provided on the steering wheel main body 12 side described later, thereby allowing the hook 45 to be inserted into the insertion opening 54 in the front and rear surface. Locking in the direction, specifically locking in the front direction, suppressing the rattling of the module 11 with respect to the steering wheel body 12, and operability when operating the horn device by operating the module 11 Has come to improve. The locking portion 38 is formed in a loop shape (U shape) with respect to the substrate portion 31, and protrudes forward from the substrate portion 31, that is, on the back side. And this latching | locking part 38 is located in the 6 o'clock direction in the center lower part of the left-right direction of the baseplate 21 (board | substrate part 31), ie, the neutral steering wheel 10. FIG.

  In the present embodiment, the movable contact 39 shown in FIG. 7 is set by a conductive conductive plate 58 that is integrally formed and embedded in the base plate 21 by insert molding or the like. The movable contact 39 faces a fixed contact 59 (FIG. 8) which is another contact of the horn device disposed on the steering wheel body 12 (FIG. 8) described later, and the horn together with the fixed contact 59 (FIG. 8). The horn switch device which is a switch of the device is configured. The movable contact 39 is elastically separated from the fixed contact 59 (FIG. 8) by the bias of the coil spring 27, and the module 11 is moved against the bias of the coil spring 27. The horn device can be actuated by contacting the fixed contact 59 (FIG. 8) by pushing in the main body 12 side.

  The peripheral wall portion 32 shown in FIG. 8 surrounds the airbag 23 in a folded state, and is located in a direction along the protruding direction of the airbag 23. A plurality of engaging portions 61 for engaging and holding the airbag cover 22 are provided across the substrate portion 31 outside the peripheral wall portion 32. In the present embodiment, the engaging portion 61 has a hook shape, but may be an opening or the like, for example, or may be provided with both a hook shape and an opening.

  On the other hand, the airbag cover 22 is formed integrally with an insulating synthetic resin, and covers a front plate portion 63 as a cover body that covers a part of the front side of the steering wheel 10, and a rear side of the front plate portion 63. And a mounting plate portion 64 as a mounting wall portion projecting downward in a rectangular tube shape from the front side.

  On the front surface, which is the back surface of the front plate portion 63, a tear line, which is a groove-like fracture portion (weak portion) (not shown) having a small thickness dimension at a position surrounded by the mounting plate portion 64, for example, is substantially H in front view. When the airbag is inflated, it is configured to be cleaved and deployed along the tear line by the deployment pressure of the airbag.

  The mounting plate portion 64 is located outside the peripheral wall portion 32 of the base plate 21, and is formed along the outer shape of the peripheral wall portion 32. Further, the mounting plate portion 64 is provided with a locking opening 65 that engages with the engaging portion 61 of the base plate 21.

  The airbag 23 is formed in a flat bag shape by, for example, a single or a plurality of base fabrics, and similarly to the substrate portion 31 of the base plate 21, a circular inflator mounting hole 66 and the inflator mounting hole Four mounting holes 67 (only three are shown) provided so as to surround 66 are formed. Further, the airbag 23 is held in a state of being folded into a predetermined shape by a wrapping member (not shown).

  The inflator 25 includes a disc-shaped inflator main body 71 and a flange 72 that projects from the inflator main body 71 to the outer peripheral side. The inflator body 71 is provided with gas injection ports (not shown), and the flange 72 is provided with four attachment holes 74 (only three are shown). Further, a contact portion (not shown) is provided at the bottom of the inflator main body 71. A wire harness is connected to the contact portion via a connector (not shown), and the inflator 25 is electrically connected to the control device via the wire harness.

  The retainer 26 has a ring shape, and includes a retainer base 76 formed of a metal plate or the like, and four mounting bolts 77 (only three are shown) fixed to the retainer base 76. The retainer base 76 is formed with a circular inflator mounting hole 78 at the center. Further, the mounting bolts 77 project from the back side so as to surround the inflator mounting holes 78, and nuts (not shown) are respectively screwed together.

  Then, the retainer 26 is inserted inside the airbag 23, and the airbag 23 is folded into a predetermined shape in a state where the mounting bolt 77 of the retainer 26 is pulled out from the mounting hole 67. Further, the airbag cover 22 is covered with the folded airbag 23, and the locking opening 65 of the mounting plate portion 64 of the airbag cover 22 is aligned with the engaging portion 61 of the peripheral wall portion 32 of the base plate 21, By pushing the mounting bolt 77 of the retainer 26 into the mounting hole 35 and pushing it into the base plate 21 side, the locking opening 65 is inserted and locked with the engaging portion 61, and the airbag cover 22 and the base plate 21 are touched with each other. (Snap-in).

  Further, the inflator 25 is assembled from the back side of the base plate 21 while the mounting hole 74 of the inflator 25 is inserted into the mounting bolt 77 protruding to the back side of the base plate 21, and a nut is screwed onto the mounting bolt 77 and tightened. In this state, the front side portion of the inflator main body 71 provided with the gas injection port of the inflator 25 is inserted into the inside of the airbag 23 from the inflator mounting hole 34 of the base plate 21, and the module 11 is configured.

  On the other hand, the steering wheel main body 12 includes a ring-shaped rim portion (ring portion) 81, a boss portion (mount portion) 82 as a hub portion as a component main body located inside the rim portion 81, and these rim portions. A plurality of, for example, three spoke portions 83 in the present embodiment connecting 81 and the boss portion 82 are configured.

  The steering wheel main body 12 includes a metal cored bar 85 and a soft covering portion 86 (FIG. 9) that integrally covers a part of the cored bar 85, and the back side of the cored bar 85 is covered. Covered by body 13.

  The metal core 85 corresponds to the rim part 81, the boss part 82 and the two spoke parts 83, the rim metal core 91, the boss metal core 92 which is a component main body attachment part (hub metal core) as a support part, and the connection A spoke cored bar 93 is provided as a part, and is formed substantially symmetrically as a whole. The remaining one spoke portion 83 is constituted by, for example, the finisher 14.

  The boss core 92 is also referred to as a boss plate or a hub core, and has a cylindrical boss 95 fitted to the steering shaft integrally at the center. Further, the boss core 92 is provided with the insertion opening 54 and the fixed contact 59 constituting the horn switch device. Further, the boss core 92 includes a protruding receiving portion 96 provided with a part of the locking receiving portion 57 and the fixed contact 59 in a loop shape (U-shape). The boss core 92 is provided with a spring receiving portion 97 that receives the other end side (rear end side) of the coil spring 27.

  Each insertion opening 54 is located at a position corresponding to the hook 45, that is, at a position spaced apart on the left and right sides of the top of the boss core 92 (position near the base end of the spoke core 93). It is provided penetrating in the front-rear direction, which is the thickness direction. These insertion openings 54 are round holes. The tip end side of the hook 45 is inserted into the insertion opening 54.

  Each wire 55 can also be called a one-touch wire, and is formed of a wire (piano wire) such as an elastically deformable metal. In the present embodiment, the wire 55 is a torsion coil spring. As shown in FIG. 6A, the wire body 101 as an engaging member body wound in a coil shape, and the wire body 101 A first arm 102 extending linearly along the tangential direction and a second arm 103 extending linearly from the wire body 101 along the tangential direction forming an acute angle with the first arm 102 are provided. The second arm 103 is integrally provided with bent (V-shaped) holding portions 104, 104 that engage with the recesses 51 of the hook 45 of the module 11 to lock the hook 45. The wire 55 changes the angle between the first arm 102 and the second arm 103 from the natural state (no load state) by changing the angle between the first arm 102 and the second arm 103 to the natural state. An urging load is generated so that it can be restored. Since the left and right wires 55 are arranged symmetrically with respect to each other, only one wire 55 will be described, and the description of the other wire 55 will be omitted.

  The locking receiving portion 57 shown in FIG. 8 is a claw that extends downward from the boss core metal 92 (projection receiving portion 96) at a position corresponding to the locking portion 38, that is, at the central lower portion of the boss core metal 92 in the left-right direction. The locking portion 38 is locked in the front-rear direction, which is the insertion direction of the hook 45 into the insertion opening 54, and specifically, is prevented from coming off in the front direction.

  The fixed contact 59 is formed of a member such as a conductive metal, and is disposed to face the movable contact 39 (FIG. 7) on the module 11 side.

  A support portion 106 is provided in the spring receiving portion 97 shown in FIGS. The spring receiving portion 97 includes an upper receiving portion 107 (FIG. 1A) as a first spring receiving portion that supports the other end of the upper spring 29 around the insertion opening 54, and a boss core. A lower receiving portion 108 (FIG. 2A) is set as a second spring receiving portion that is provided on the gold 92 (projection receiving portion 96) and supports the other end side of the lower spring 30.

  The support portion 106 supports the other end portion 27b of the coil spring 27 in a state of being separated from the boss core metal 92 on one end side (floating from the boss core metal 92), so that the other end portion 27b is supported by the boss core metal. It is intended to prevent direct contact with 92. The support portion 106 is, for example, a convex portion, and a portion facing the module 11 side, that is, the coil spring 27 side is a support surface (seat surface) 106 a of the coil spring 27. Further, a plurality of, for example, four support portions 106 are arranged in the circumferential direction of the coil spring 27 and are spaced from each other at substantially equal intervals, and the respective support surfaces 106a are substantially flush with each other. Therefore, a space between these adjacent support portions 106 and 106 is a recess 109 that is recessed relative to the support surface 106a of the support portion 106.

  The upper receiving portion 107 shown in FIG. 1B is recessed, for example, around the insertion opening 54 and holds the outer periphery on the other end side of the coil spring 27 (upper spring 29). Therefore, the upper receiving portion 107 is formed in an annular shape, and a support portion 106 is provided inside the upper receiving portion 107, and the space between the support portions 106 and 106 in the upper receiving portion 107 is a recess 109. It has become. That is, these recesses 109 are continuous with the insertion opening 54.

  The lower receiving portion 108 shown in FIG. 2 (b) is provided on the other end side of the coil spring 27 (lower spring 30) by protruding from the boss core 92 (projecting receiving portion 96) near the fixed contact, for example. By inserting the coil spring 27, the inner periphery on the other end side of the coil spring 27 (lower spring 30) is held. Therefore, the support portions 106 are respectively provided so as to be continuous with the outer peripheral surface of the lower receiving portion 108, and the concave portions 109 are arranged along the periphery of the lower receiving portion 108.

  The cover body 13 shown in FIG. 8 is also called a body cover or a lower cover, and is formed of, for example, a synthetic resin. The cover body 13 covers the back side of the boss part 82 excluding the boss 95 and the back side of each spoke part 83. It is configured as follows.

  When the steering wheel 10 is assembled, the cover body 13 is combined with the steering wheel body 12 from the back side and attached to the steering wheel body 12 while being positioned. Thereafter, the boss 95 of the steering wheel body 12 is fitted to the steering shaft, and is fastened and fixed with a nut (not shown).

  For this steering wheel body 12, the module 11 attaches one end side of the coil spring 27 to the mounting portion 37, and then attaches the tip end side of the coil spring 27 to the spring receiving portion 97 and locks it to the locking portion 38. While holding the receiving portion 57, each insertion opening 54 and each hook 45 are aligned and pushed from the front side, so that the holding portion 104 of the wire 55 located in each insertion opening 54 is connected to the recess 51 of the hook 45. It engages with the locking surface 52 (FIGS. 6B and 6D). As a result, the module 11 is engaged with the steering wheel main body 12 and supported to prevent the module 11 from coming off at three places on both sides and the lower side. Therefore, the position of the module 11 is restricted relative to the steering wheel body 12 in the front-rear direction, the up-down direction, and the left-right direction, and the hooks 45 are prevented from coming off in the front direction by the wires 55 (FIG. 6B). )), And the locking portion 38 is prevented from coming off in the front direction by the locking receiving portion 57 (FIG. 6D).

  In this state, the steering wheel main body 12 is guided along the front-rear direction by the hooks 45, and the module 11 is attached to the steering wheel main body 12 (boss portion 82) on both upper and lower sides by the coil spring 27. On the other hand, it is elastically held in the front-rear direction (FIGS. 6B and 6C).

  The steering wheel 10 including the module 11 is configured to be attached to the steering shaft by, for example, performing electrical wiring on a contact portion of the inflator 25 or the like.

  The steering wheel 10 configured as described above is operated when the occupant in the driver's seat holds the rim 81 and rotates. Further, by pushing the airbag cover 22 of the module 11 that also serves as a pushing portion against the biasing load of each coil spring 27, the hook 45 and the insertion opening 54 are fitted to each other, The module 11 is guided relatively forward by the fitting of the locking portion 38 and the locking receiving portion 57 (FIGS. 6B and 6D), and any one of the movable contacts 39 is fixed. When the contact 59 is touched, the horn device on the vehicle body is blown.

  Further, in the event of a frontal collision of the vehicle, gas is rapidly injected from the inflator 25 into the airbag 23, and the airbag 23 folded and stored rapidly expands. Then, due to the inflation pressure of the airbag 23, the airbag cover 22 is cleaved along the tear line to form a projection port of the airbag 23, and the airbag 23 projects from the projection port and is inflated and deployed in front of the occupant. And restrain the occupant. At this time, the module 11 is held by the steering wheel body 12 against an impact at the time when the airbag 23 is inflated and deployed because each hook 45 is mainly locked by each wire 55.

  In the above embodiment, even when the module 11 is pushed into the boss portion 82 (steering wheel main body 12) against the bias of the coil spring 27, such as when the horn device is operated, the other end portion 27b of the coil spring 27 is retained. Is separated from the boss portion 82 (boss core metal 92) by the support portion 106, so that an abnormal noise is generated by contact (rubbing) between the other end portion 27b of the coil spring 27 and the boss portion 82 (boss core metal 92). (Low tone) is not generated. Therefore, for example, a process of attaching a non-woven fabric to the other end portion 27b of the coil spring 27 and the boss portion 82 (boss core metal 92) becomes unnecessary, and the number of manufacturing steps and parts can be reduced and the manufacturing cost can be reduced.

  Further, since the contact can be prevented by the simple convex shape of the support portion 106, it is possible to prevent abnormal noise at low cost without performing special processing or the like on the coil spring 27 itself.

  Further, the attachment of the coil spring 27 to the mounting portion 37 will be described in more detail. One end side of the coil spring 27 is inserted into the mounting portion 37 from the state shown in FIGS. 3 (a) and 4 (a). After (FIG. 3 (b) and FIG. 4 (b)), as shown in FIG. 3 (c) and FIG. 4 (c), the coil spring 27 is rotated (twisted) in the circumferential direction with respect to the mounting portion 37. The one end portion 27a of the coil spring 27 contacts the rib 41 in the circumferential direction, the coil spring 27 is positioned in the circumferential direction with respect to the mounting portion 37, and the one end side of the coil spring 27 is pressed by the retaining portion 42. And the bulging portion 43 bulging from the mounting portion 37 is inscribed (strongly interfered) with one end side of the coil spring 27 (FIG. 5) and is prevented from rotating in the circumferential direction. And the other end 27b is stably positioned.

  Therefore, the other end portion 27b of the coil spring 27 in which the one end portion 27a is positioned by the rib 41 has a predetermined fixed positional relationship with respect to the position of the one end portion 27a, that is, the position of the rib 41 (mounting portion 37). Therefore, the coil spring 27 with respect to the steering wheel main body 12 (boss portion 82) is attached to the steering wheel main body 12 (boss portion 82) at a fixed position by mounting the module 11 with the coil spring 27 attached to the mounting portion 37 in this way. The position of the other end 27b is also fixed. For this reason, the position of the support portion 106 is set in advance so that the position of the other end portion 27b is shifted from the support portion 106, that is, the other end portion 27b faces the recess 109 between the support portions 106 and 106. By designing, when assembling the module 11 to the steering wheel main body 12 (boss part 82), the confirmation work of mutual alignment between the other end part 27b of the coil spring 27 and the support part 106 becomes unnecessary. The number of work steps can be reduced, and the manufacturing cost can be further reduced.

  In addition, since the bulging portion 43 acts to prevent the coil spring 27 from rotating with respect to the mounting portion 37, the coil spring 27 is caused by vibration during transportation of the steering wheel 10 including the module 11, for example. It is possible to reliably prevent the position of the other end portion 27b from being displaced with respect to the position of the support portion 106 by detaching from the mounting portion 37 or rotating in the circumferential direction.

  Further, since the rib 41 and the bulging portion 43 can be easily configured when the base plate 21 is molded, a configuration for positioning and preventing the coil spring 27 from being attached to the mounting portion 37 can be manufactured at low cost.

  The component body is the boss portion 82 (boss metal core 92) of the steering wheel body 12 of the steering wheel 10, so that the other end of the coil spring 27 is caused by vibration transmitted from the engine of the vehicle or vibration transmitted from the road surface during traveling. The part 27b rubs against the boss part 82 (boss metal core 92) and no abnormal noise is generated, and no abnormal noise is generated when the steering wheel 10 is rotated. Difficult to give discomfort to passengers in the driver's seat.

  Further, since the coil spring 27 is a horn spring that elastically separates the movable contact 39 and the fixed contact 59 of the horn switch device, the occupant pushes the module 11 against the bias of the coil spring 27 and the horn device However, it is possible to reliably prevent the generation of abnormal noise during the operation.

  In the above-described embodiment, the mounting portion 37 protrudes from the substrate portion 31. However, the mounting portion 37 may be recessed from the substrate portion 31, for example.

  In addition, the hook 45 is projected from the module 11 (base plate 21), and the insertion opening 54 and the wire 55 are arranged in the steering wheel main body 12 (boss core 92), but the module 11 (base plate 21) is inserted. The opening 54 and the wire 55 may be disposed so that the hook 45 protrudes from the steering wheel body 12 (boss core 92).

  Further, as the module 11, for example, a pad body containing an impact absorber can be used instead of the airbag device.

  The module 11 is attached to the steering wheel body 12 to form the steering wheel 10. However, the module 11 can be applied not only to the steering wheel 10 but also to various other automobile parts.

  The present invention can be suitably used, for example, as a steering wheel for an automobile.

10 Steering wheels as automotive parts
11 modules
27 Coil spring
27b other end
37 Mounting part
41 Ribs as positioning parts
43 Swelling part as rotation prevention part
82 Boss, which is the hub as the component body
106 Support section

Claims (4)

A component body;
A module to be attached to the component body,
A coil spring interposed between the component main body and the module;
One of the component main body and the module includes a mounting portion for mounting one end side of the coil spring,
The other of the component main body and the module includes a support portion that supports the other end of the coil spring in a state of being separated from the other of the component main body and the module. . The automobile part according to claim 1, wherein the mounting portion includes a positioning portion that positions the other end portion of the coil spring by fixing a position on one end side of the coil spring. The automobile part according to claim 1 or 2, wherein the mounting portion includes a rotation prevention portion that prevents rotation of the coil spring in the circumferential direction. The automobile part according to any one of claims 1 to 3, wherein the part body is a hub part of a handle body of the handle.

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