阅读说明：本技术 安全气囊装置的罩体 (Cover body of airbag device ) 是由 大木拓也 木内阳平 于 2019-05-16 设计创作，主要内容包括：本发明提供覆盖安全气囊的安全气囊装置的罩体,具备罩主体部和安装于罩主体部的表面侧的标志。标志具备面状光源、覆盖面状光源且具有透光性的面板、以及固定于罩主体部且保持面板的外周部的修饰构件。面板具备面板部和设于面板部的外周部且供修饰构件卡合的卡合部。(The present invention provides a cover body of an airbag device for covering an airbag, which is provided with a cover main body portion and a mark attached to the surface side of the cover main body portion. The sign includes a planar light source, a translucent panel covering the planar light source, and a decorative member fixed to the cover main body portion and holding an outer peripheral portion of the panel. The panel includes a panel portion and an engaging portion provided at an outer peripheral portion of the panel portion and to which the garnish member is engaged.)

1. A cover body of an airbag device for covering an airbag, characterized in that,

the disclosed device is provided with:

a cover main body portion; and

A decoration component mounted on the surface side of the cover main body part,

The decoration component comprises:

A light source;

A translucent decorative body covering the light source; and

A holding body fixed to the cover main body portion and holding an outer peripheral portion of the garnish body,

The decorative body includes:

a decorative part; and

An engaging part provided on the outer peripheral part of the decorative part and engaged with the holding body.

2. the cover according to claim 1,

The engaging part comprises a first protrusion and a first groove respectively provided on the front surface side of the engaging part,

The holding body is provided with a holding part overlapping with the surface side of the engaging part,

the holding portion includes a second groove portion fitted with the first protrusion and a second protrusion portion fitted with the first groove portion.

3. The cover according to claim 2,

the first protrusion and the second groove, and the first groove and the second protrusion are fitted in a tapered manner.

4. The cover according to claim 1,

The engaging portion is formed over the entire circumference of the outer peripheral portion of the decorative portion,

The holding body is formed in a ring shape and fitted to the engaging portion over the entire circumference.

5. The cover according to claim 1,

The decorative member includes an engaging body disposed on a rear surface side of the cover main body portion,

the holding body includes an engaging portion that penetrates from the front surface side to the back surface side of the cover body portion and engages with the engaging body.

Technical Field

The present invention relates to a cover body of an airbag device in which a decorative member is attached to a front surface side of a cover main body portion.

background

Conventionally, an airbag device provided in a fixed portion such as a hub core portion of a steering wheel of a vehicle such as an automobile is used. The airbag device of the conventional example includes a bag-shaped airbag, an inflator for supplying gas to the airbag, and a cover for covering and housing the airbag when the airbag is not deployed. When the vehicle receives an impact, for example, due to a collision or the like, the airbag is inflated by supplying gas from the inflator to the airbag. When the airbag inflates, the cover body is broken along a predetermined breaking line, i.e., a tear line, to form a plurality of door portions. The door sections are deployed around the hinge sections, whereby the airbag is deployed toward the passenger side, and the passenger is restrained and protected.

in the cover body of the airbag device of the conventional example, the following structure is known: a sign (ornament) as a decorative member is attached to a substantially central portion of the front surface side of the cover main body portion, and the sign emits light.

In such a cover body of an airbag device, a structure is known in which a light-emitting sign is attached to a substantially central portion of the front surface side of the cover main body portion. The cover body having such a structure includes a light source disposed on the front surface side of the cover body portion, and a mark body as a decorative body covering the light source and having translucency. The sign body includes a plurality of leg portions protruding to the back side. The leg portion penetrates the cover main body portion and is fixed to the cover main body portion by thermal welding, thereby fixing the sign body to the cover main body portion. Since the marker must be kept fixed to the cover body portion during the deployment of the airbag, a plurality of leg portions are provided on the entire lower surface of the marker. Then, light from the light source is incident on the interior of the marker, and the marker emits light (see JP 2017-.

However, in the cover body of the airbag device having the above-described configuration, since the plurality of leg portions protrude from the entire lower surface of the marker, the light emission effect of the marker is likely to differ between the position of the leg portion and the position around the leg portion, and uniformity of light emission of the marker cannot be obtained.

disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cover body of an airbag device that can obtain uniformity of light emission of a garnish.

A cover of an airbag device covering an airbag according to an embodiment includes: a cover main body portion; and a decorative member attached to the surface side of the cover main body portion. The decoration component is provided with: a light source; a translucent decorative body covering the light source; and a holding body fixed to the cover main body portion and holding an outer peripheral portion of the garnish body. The decoration body is provided with: a decorative part; and an engaging part provided on the outer peripheral part of the decorative part and engaged with the holding body.

With this configuration, the holding body is engaged with the engaging portion provided on the outer peripheral portion of the decorative body, and the decorative body can be held by the holding body on the cover main body portion, so that the decorative portion of the decorative body does not require a holding structure, and uniformity of light emission of the decorative portion of the decorative body is obtained.

The engaging portion may include a first protrusion and a first groove provided on the front surface side of the engaging portion. The holding body may include a holding portion that overlaps the front surface side of the engagement portion. The holding portion may include a second groove portion fitted with the first protrusion and a second protrusion portion fitted with the first groove portion.

With this configuration, the engaging portion of the garnish is fitted to the holding portion of the holding body in a concave-convex manner, and the state in which the garnish is reliably held by the cover main body portion can be maintained when the airbag is deployed.

The first protrusion and the second groove, and the first groove and the second protrusion may be fitted in a tapered manner.

Since the first protrusion and the second groove, and the first groove and the second protrusion are respectively fitted in a tapered manner, the retainer presses the garnish to the cover body portion, and in addition, the retainer and the garnish can be firmly fixed, thereby preventing the garnish from rattling or rattling.

The engaging portion may be formed over the entire circumference of the outer peripheral portion of the decorative portion. The holding body may be formed in a ring shape and fitted to the engaging portion over the entire circumference.

Since the annular holding body is fitted to the engagement portion of the garnish body over the entire circumference, stable fixation can be achieved.

The decorative member may include an engaging body disposed on the rear surface side of the cover body portion. The holding body may include an engaging portion that penetrates from the front surface side to the back surface side of the cover body portion and engages with the engaging body.

By passing the engaging portion of the holding body through the cover main body portion and engaging with the engaging body, the garnish body, the light source, and the cover main body portion can be fixed while being sandwiched by the holding body and the engaging body, and the assembling workability can be improved.

Drawings

fig. 1 is a view of a cover body of an airbag device according to a first embodiment, and is a cross-sectional view taken along line a-a of fig. 4.

Fig. 2 is a sectional view of the cover body in an exploded state of the garnish and the retainer.

Fig. 3 is an exploded perspective view of the cover of the first embodiment.

Fig. 4 is a front view of a steering wheel provided with the cover of the first embodiment.

Fig. 5 is a front view of the decorative body of the cover body of the second embodiment.

fig. 6 is a front view of a decorative body of a cover body of a third embodiment.

Fig. 7 is a cross-sectional view showing an engagement state between the garnish and the retainer of the cover body according to the fourth embodiment.

Fig. 8 is a perspective view of an engaging portion of a decorative body of a cover body according to a fifth embodiment.

Fig. 9 is a front view of a part of a decorative body of a cover body according to a sixth embodiment.

Fig. 10 is a view of the garnish and the retainer of the cover according to the sixth embodiment, and is a cross-sectional view taken along line B-B in fig. 9.

Fig. 11 is a view of a decorative body of a cover body of a sixth embodiment, and is a sectional view taken along line C-C of fig. 9.

Fig. 12 is a diagram of a cover of the seventh embodiment, which is a sectional view corresponding to the sectional view taken along a-a in fig. 4.

Detailed Description

The cover body of the airbag device according to the first embodiment will be described below with reference to fig. 1 to 4.

Fig. 4 shows a steering wheel 10 of a vehicle. The steering wheel 10 includes a steering wheel main body 11 and an airbag device 12 attached to a passenger side of the steering wheel main body 11. The steering wheel 10 is usually attached to a steering shaft (not shown) provided in the vehicle in an inclined state, but hereinafter, the description will be made with the steering shaft side as the rear side, the passenger side as the front side, and the direction toward the windshield as the upper side, with reference to the straight-ahead state of the vehicle.

The steering wheel main body 11 includes an annular rim portion 14 serving as a grip portion, a boss portion 15 located inside the rim portion 14, and a plurality of spoke portions 16 connecting the rim portion 14 and the boss portion 15.

a boss (not shown) having a substantially cylindrical shape and fitted to the steering shaft is provided on the rear surface of the boss portion 15, and a boss plate (not shown) constituting the core is integrally fixed to the boss by insert casting or the like by die casting a magnesium alloy or the like. The core ribs of the spoke portions 16 extend integrally from the boss plate, or the core ribs of the spoke portions 16 are fixed to the boss plate by welding or the like. Further, the core of the rim portion 14 is fixed to the core of the spoke portion 16 by welding or the like. A skin portion made of soft urethane foam or the like is formed on the outer periphery of the core of the rim portion 14 and the outer periphery of the core of the spoke portion 16 on the rim portion 14 side, and the whole or a part of the outer periphery of the skin portion is covered with natural leather or artificial leather.

The airbag device 12, also referred to as an airbag module, is arranged to cover the front side of the boss portion of the steering wheel main body 11. The airbag device 12 includes a bottom plate as a mounted member made of a metal plate or the like, a bag-shaped airbag, an inflator for ejecting gas, and the like, and further includes a cover 18. The bottom plate of the airbag device 12 is attached to the steering wheel main body 11 via a horn plate, a bracket portion, or the like. An airbag, an inflator, and a cover 18 are attached to a floor of the airbag device 12. The airbag folded to be smaller is covered by the cover 18.

As shown in fig. 1 and 3, the cover 18 is also called a case, a module cover, or the like, and includes a cover main body portion 19 integrally molded of a soft synthetic resin such as tpo (thermoplastic polyolefin) or the like, and a logo 20 as a decorative member attached to the cover main body portion 19.

The cover body portion 19 includes a cover portion 21 that covers the boss portion 15 and a part of the spoke portion 16, and a peripheral wall portion 22 that is provided in a cylindrical shape so as to protrude from the rear surface side (lower surface side) of the cover portion 21. The inner portion surrounded by the cover portion 21 and the peripheral wall portion 22 serves as an airbag housing portion for housing the folded airbag. A portion of the cover portion 21 facing the front side of the airbag housing portion becomes a surface portion 23. A mounting recess 24 for accommodating the mark 20 is recessed in a central portion of the front side, which is a design surface of the surface portion 23.

A tear line (not shown) is formed at a position facing the airbag housing portion on the rear surface side of the cover portion 21 and avoiding the attachment recess 24 of the surface portion 23. By the rupture of the tear line, a plurality of door portions are formed at the time of deployment of the airbag. The tear line may be referred to as a scheduled line portion or a scheduled breaking portion, and is recessed in a groove shape on the back surface side of the surface portion 23, and is formed as a weakened portion weaker than the other portions of the surface portion 23. The tear line can be arbitrarily set according to the shape and number of pieces of the door portion to be set, but in the first embodiment, for example, a central tear portion that continues so as to cross the airbag housing space of the face portion 23 from one side portion of the attachment concave portion 24 to the other side portion via the lower portion, and four peripheral tear portions that extend vertically along the outer edge portion of the airbag housing space of the face portion 23 from the left and right ends of the central tear portion as starting points are formed. When the outer peripheral tear portion is extended around the outer peripheral edge of the airbag housing space of the surface portion 23, the outer peripheral tear portion is caused to terminate at a predetermined position before the outer peripheral tear portions meet each other in the 12-point direction and the 6-point direction, becomes a portion where the outer peripheral tear portion is not provided with a predetermined width, and serves as a hinge portion that supports the door at the time of deployment of the airbag. Therefore, the door portion on the side including the sign 20 has the upper side of the mounting recess 24 of the surface portion 23 as a hinge portion, and the door portion on the side not including the sign 20 has the lower side of the mounting recess 24 of the surface portion 23 as a hinge portion, thereby forming a door that is opened upward and downward, respectively.

The peripheral wall portion 22 is provided with an engagement structure (not shown) such as an engagement claw portion and an engagement opening portion for engaging the bottom plate with the cover 18.

The attachment recess 24 is formed to correspond to the shape of the marker 20, and is formed in a substantially circular shape in the cover 18 of the first embodiment, for example, when viewed from the front. The mounting recess 24 is formed with a plurality of insertion holes 25 and wiring holes (not shown) for mounting the marker 20. The plurality of insertion holes 25 are formed at positions on the outer periphery of the mounting recess 24, for example, at positions at equal intervals in the circumferential direction on the outer periphery of the mounting recess 24. The insertion hole 25 is formed in a circular hole shape to penetrate the attachment recess 24 in the thickness direction, i.e., the front-rear direction. The wiring hole (not shown) is formed to penetrate the mounting recess 24 in the thickness direction, i.e., the front-rear direction, at the outer periphery of the mounting recess 24, for example, at the lower side of the mounting recess 24. A circular recessed portion 26 is formed around each insertion hole 25 on the back side of the outer peripheral portion of the attachment recessed portion 24, and a positioning projection 27 is provided so as to project on the inner peripheral side of the recessed portion 26. The positioning projections 27 may be formed annularly in the circumferential direction, or may be provided to project in a plurality of portions in the circumferential direction.

As shown in fig. 1 and 3, the emblem 20 is also called a decoration or the like, and includes a planar light source 30 as a light source, a face plate 31 as a decoration body covering the planar light source 30, a trim member 32 as a holding body for holding the face plate 31 to the cover main body portion 19, and a clip 33 as a locking body for locking the trim member 32 to the cover main body portion 19. The planar light source 30, the panel 31, and the trim member 32 of the sign 20 are disposed in the attachment recess 24 of the cover main body portion 19, and the clip 33 is disposed on the back side of the cover main body portion 19, and is fixed to the cover main body portion 19 in a state where the panel 31, the planar light source 30, and the surface portion 23 of the cover main body portion 19 are sandwiched between the trim member 32 and the clip 33.

the planar light source 30 is, for example, an organic EL substrate having a single light emitting surface 37, and the light emitting surface 37 is formed by mounting organic EL elements on the surface of the substrate 36 and is continuous in a planar shape. As the planar light source 30, for example, a light guide plate system including an LED and a light guide plate for guiding light incident from the LED and emitting the light from the surface may be used. The planar light source 30 is formed in a disc shape that can be disposed in the mounting recess 24. The planar light source 30 is disposed in a region of the mounting recess 24 inside the outer peripheral portion where the insertion hole 25 is formed, and is fixed so as to be sandwiched between the cover main body portion 19 and the panel 31. The substrate 36 is connected to a power supply cable (not shown). The cable is passed through the wiring hole of the mounting recess 24 and connected to a power supply connector or the like disposed in the boss portion 15.

The panel 31 is made of light-transmitting synthetic resin such as polymethyl methacrylate (PMMA) or Polycarbonate (PC), and is formed in a disc shape that can be disposed in the mounting recess 24. The panel 31 includes a panel portion 40 as a decorative portion, and an engaging portion 41 provided on an outer peripheral portion of the panel portion 40.

The panel portion 40 of the panel 31 is formed in a circular plate shape. The front surface side (front surface side) of the panel portion 40 is a smooth surface without unevenness, and is formed in a convex curved surface shape with a center protruding. The back surface side of the panel portion 40 is a smooth surface without irregularities, and is formed in a planar shape. The back surface side of the panel portion 40 is formed in a flat shape continuing to the back surface side of the engagement portion 41. The front side of the panel portion 40 is appropriately subjected to surface treatment. For example, a light-transmitting film is attached to the front side of the panel portion 40. The thin film is, for example, a half mirror film in which a metal thin film is formed in accordance with the shape of a design or a trademark, and is configured to reflect light incident from the outside to the metal thin film and transmit light incident from the planar light source 30. A storage recess for storing the planar light source 30 may be formed on the rear surface side of the panel unit 40.

The engaging portion 41 is formed in a ring shape along the entire periphery of the panel portion 40. As shown in fig. 1 and 2, the engagement portion 41 includes an engagement portion side projection 42 and an engagement portion side groove portion 43, the engagement portion side projection 42 is a projection protruding toward the front surface side and provided at the outermost peripheral portion of the engagement portion 41, and the engagement portion side groove portion 43 is provided in a groove shape at a position closer to the inner peripheral side than the engagement portion side projection 42 and between the engagement portion side projection 42 and the panel portion 40. The engaging portion side protrusion 42 and the engaging portion side groove portion 43 are formed in a ring shape over the entire circumference of the engaging portion 41.

the trim member 32 is made of, for example, synthetic resin such as polyester elastomer, and is formed in a ring shape that can be disposed in the mounting recess 24. The dressing member 32 includes an annular holding portion 46 and a plurality of engaging portions 47 protruding from the rear surface side of the holding portion 46. At least the front side of the holding portion 46 is modified. Examples of the decoration include any of piano black paint coating, metallic paint coating, silver oxide tone gold plating, wood grain printing, and carbon composite pattern film insert molding.

The holding portion 46 engages such that the inner peripheral portion side of the holding portion 46 overlaps the front surface side of the engaging portion 41 of the panel 31, thereby positioning the panel 31 and holding the panel 31 in the mounting recess 24 of the cover main body portion 19. As shown in fig. 1 and 2, the holding portion 46 includes a holding portion side groove portion 48 and a holding portion side projection 49, wherein the holding portion side groove portion 48 is provided in a groove shape on the back surface side of the holding portion 46, and the holding portion side projection 49 is provided on the inner peripheral side of the holding portion side groove portion 48 and at the innermost peripheral portion of the holding portion 46 so as to project toward the back surface side. The holding portion side groove portion 48 and the holding portion side protrusion portion 49 are formed in a ring shape over the entire circumference of the holding portion 46. Then, the back surface side of the holding portion 46 is overlapped with the front surface side of the engaging portion 41 of the panel 31, so that the holding portion side groove portion 48 is fitted with the engaging portion side protrusion portion 42, and the holding portion side protrusion portion 49 is fitted with the engaging portion side groove portion 43. The holding portion side groove portion 48 and the engaging portion side protrusion 42, and the holding portion side protrusion 49 and the engaging portion side groove portion 43 are fitted over the entire circumference. The surface of the holding portion 46 is formed in a convex curved surface shape or a flat surface shape so as to be continuous with the front surface side of the panel portion 40 of the panel 31 without a step in a state where the engaging portion 41 of the panel 31 is fitted to the holding portion 46 of the dressing member 32.

The cover 18 may also have a positioning structure for positioning the circumferential positions of the panel 31 and the dressing member 32. As the positioning structure, for example, a concave-convex fitting structure for positioning may be separately provided for the engaging portion side protrusion 42 and the engaging portion side groove portion 43 of the panel 31, and the holding portion side groove portion 48 and the holding portion side protrusion 49 of the trim member 32.

On the back surface side of the holding portion 46, the engaging portion 47 of the trim member 32 protrudes from a position corresponding to the position of each insertion hole 25 provided in the attachment recess 24 of the cover main body portion 19. As shown in fig. 1 and 2, the locking portion 47 includes a columnar portion 52 and a locking claw portion 53 having a diameter that is expanded in a stepwise manner on the tip end side of the columnar portion 52. The locking portion 47 is configured to be capable of being inserted into the insertion hole 25 of the mounting recess 24, and the locking claw portion 53 is locked to the clip 33 disposed on the rear surface side of the cover main body portion 19.

The clip 33 is also called a lower mark or the like, and is formed into a ring shape by injection molding of synthetic resin such as abs (acrylonitrile butadiene styrene). As shown in fig. 1, the clip 33 includes a plurality of locking holes 56 into which the locking portions 47 of the trim member 32 are press-fitted, and a plurality of locking receiving portions 57 for locking the locking claw portions 53 of the locking portions 47 press-fitted into the locking holes 56. The locking receiving portion 57 is formed to be thinner than the portion of the clip 33 other than the locking receiving portion 57 in the front-rear direction, and is formed to be curved so as to protrude toward the front surface side. A locking hole 56 is formed in the center of the locking receiving portion 57. The clip 33 is disposed on the back surface side of the cover main body portion 19 in a state where the inner peripheral portion of the clip 33 is engaged with and positioned on the outer periphery of the positioning projection 27. The locking receiving portions 57 of the clip 33 are disposed in the recessed portions 26 of the cover body 19, and are used to lock the locking claw portions 53 of the locking portions 47 inserted into the insertion holes 25 of the cover body 19 and press-fitted into the locking holes 56.

In manufacturing the cover 18, the cover main body portion 19 including the cover portion 21 and the peripheral wall portion 22 is injection molded in advance with a synthetic resin, and then the planar light source 30, the panel 31, and the trim member 32 are sequentially assembled in the mounting recess portion 24 of the cover main body portion 19. At this time, the engaging portion 41 of the panel 31 and the holding portion 46 of the trim member 32 are integrally fitted to each other, that is, the engaging portion side protrusion 42 and the engaging portion side groove 43 of the engaging portion 41 and the holding portion side groove 48 and the holding portion side protrusion 49 of the holding portion 46 are integrally fitted to each other. The engagement portions 47 of the trim member 32 are inserted through the insertion holes 25 of the attachment recess 24.

Further, the clip 33 is disposed on the back surface side of the cover body portion 19, and the front end side including the locking claw portion 53 of the locking portion 47 protruding from each insertion hole 25 is press-fitted into each locking hole 56 of the clip 33, so that the locking claw portion 53 passes through the locking hole 56 and is locked to the back surface side of the locking receiving portion 57.

As a result, the sign 20 is firmly fixed to the cover main body portion 19 in a state where the panel 31, the planar light source 30, and the cover main body portion 19 are sandwiched by the trim member 32 and the clip 33. In this state, the planar light source 30, the panel 31, and the decorative member 32 of the sign 20 are accommodated in the mounting recess 24 and are not largely projected from the front surface side of the surrounding surface portion 23 of the mounting recess 24 and are substantially flush with each other.

When a vehicle equipped with the airbag device 12 having the cover 18 at the steering wheel 10 collides or the like, the control device activates the inflator to supply gas to the airbag. Thus, the airbag is rapidly inflated and deployed, the cover 18 is broken along the tear line by the pressure of the inflation and deployment to form a door portion, the door portion is pivoted about the hinge portion to form a protrusion opening as an opening through which the airbag is blown out, and the airbag is deployed from the protrusion opening toward the front of the passenger, thereby protecting the passenger.

In an automobile in which the airbag device 12 having the cover 18 is mounted on the steering wheel 10, when external light enters a metal film of a film provided on the front surface side of the panel portion 40 of the panel 31, the logo design is visible by reflection or the like of the metal film. When the planar light source 30 emits light, the light from the light emitting surface 37 of the planar light source 30 enters the panel unit 40 of the panel 31, passes through the panel unit 40, and is emitted from the front surface side of the panel unit 40. In this case, the front surface side and the back surface side of the panel portion 40 are formed as smooth surfaces without unevenness, so that light is uniformly transmitted through the panel portion 40, and uniformity of light emission of the panel portion 40 is obtained. Further, the metal thin film allows the design of the logo to be seen through the metal thin film.

the planar light source 30 combined with the panel 40 without the engaging projection or the like for attachment to the cover 18 on the back side thereof does not need to form a through hole for passing the engaging projection or the like on the light-emitting surface 37, and thus the panel 40 can be made to emit light uniformly without generating a non-light-emitting portion in an island shape on the light-emitting surface 37, and the manufacturing cost can be favorably suppressed in terms of the ease of processing and the yield (yield).

As described above, according to the cover 18 of the first embodiment, the decorative member 32 is engaged with the engaging portion 41 provided on the outer peripheral portion of the panel portion 40 of the panel 31, and the panel 31 can be held by the cover main body portion 19 by the decorative member 32, so that it is not necessary to provide holding structures or the like on the front surface side and the back surface side in the direction in which light of the panel portion 40 is transmitted, and the front surface side and the back surface side of the panel portion 40 can be formed into smooth surfaces, and further, light from the planar light source 30 can be uniformly transmitted through the entire panel portion 40, and uniformity of light emission of the entire panel portion 40 can be obtained.

Further, since the engaging portion 41 of the panel 31 and the holding portion 46 of the trim member 32 are fitted to each other in a concave-convex manner, the panel 31 can be maintained in a state of being reliably held by the cover main body portion 19 when the airbag is deployed.

Further, since the engaging portion 41 formed over the entire circumference of the panel 31 is fitted over the entire circumference of the ring-shaped dressing member 32, the panel 31 can be firmly fixed by the dressing member 32. At the same time, light is less likely to leak to the outer periphery of the panel 31.

Further, by passing the engaging portion 47 of the trim member 32 through the cover body portion 19 and engaging with the clip 33, the panel 31, the planar light source 30, and the cover body portion 19 can be fixed by being sandwiched between the trim member 32 and the clip 33, that is, can be fixed by one operation, and thus, the assembling workability can be improved.

Next, a second embodiment is shown in fig. 5 and a third embodiment is shown in fig. 6 to explain the present invention. Note that the same components and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in fig. 5 or 6, the panel portion 40 of the panel 31 may be formed substantially in a square shape. The panel portion 40 may have other shapes such as an oval shape, a diamond shape, and a triangular shape.

The engaging portion 41 of the panel 31 may be provided on the entire periphery of the panel portion 40 regardless of the shape of the panel portion 40, but may be provided only on both side regions of the panel portion 40 as shown in fig. 5, or may be provided on an outer peripheral region of the panel portion 40 other than the upper region as shown in fig. 6.

Next, a fourth embodiment will be described with reference to fig. 7. Note that the same components and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The engagement portion side protrusion 42 and the holding portion side groove portion 48, and the engagement portion side groove portion 43 and the holding portion side protrusion 49 are formed to be fitted in tapered shapes, respectively. That is, the outer side surfaces of the engaging portion side protrusion 42 and the holding portion side protrusion 49 are formed in a tapered shape so that the width of the proximal end side is wide and the width of the distal end side is narrow, and the inner side surfaces of the engaging portion side groove portion 43 and the holding portion side groove portion 48 are formed in a tapered shape so that the width of the groove back side is narrow and the width of the opening side is wide. In the fourth embodiment, the outer side surface on the inner peripheral side of the engagement portion side protrusion 42 is formed in a tapered surface shape, the inner side surfaces on the inner peripheral side and the outer peripheral side of the engagement portion side groove portion 43 are formed in tapered surfaces, the two outer side surfaces on the inner peripheral side and the outer peripheral side of the holding portion side protrusion 49 are formed in tapered shapes, and the inner side surface on the inner peripheral side of the holding portion side groove portion 48 is formed in a tapered shape.

Further, since the engaging portion side protrusion 42 and the holding portion side groove portion 48, and the engaging portion side groove portion 43 and the holding portion side protrusion 49 are respectively fitted in a tapered shape, the force of pressing the panel 31 to the cover main body portion 19 by the dressing member 32 is introduced into the panel 31 in the outer diameter direction, or the panel 31 is pressed in the inner diameter direction, and the panel 31 and the dressing member 32 are firmly fixed in a state of being fitted in a concave-convex manner, so that the rattling of the panel 31 can be prevented, and the generation of abnormal noise can be prevented.

Next, a fifth embodiment will be described with reference to fig. 8. Note that the same components and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The engaging portion side protrusions 42 provided on the engaging portion 41 of the panel 31 may be provided along the engaging portion 41 in a plurality of protruding shapes. The engagement portion side projection 42 is provided, for example, in a cylindrical shape, but may be provided along the engagement portion 41 in a long substantially oval shape or the like. In this case, the engagement portion side groove portions 43 are formed between the plurality of projecting engagement portion side projections 42 and the panel portion 40, between the adjacent engagement portion side projections 42, and the like.

The holding portion side groove portions 48 of the holding portion 46 of the trim member 32 are provided in a plurality of concave shapes into which the respective engaging portion side protrusions 42 of the engaging portion 41 are fitted, corresponding to the engaging portion 41 of the panel 31. In this case, the portion of the back surface side of the holding portion 46 other than the recessed holding portion side groove portion 48 becomes the holding portion side protrusion 49.

With this configuration, the engagement portion 41 of the panel 31 and the holding portion 46 of the trim member 32 are fitted to each other in a concave-convex manner, whereby the circumferential positions of the panel 31 and the trim member 32 can be positioned and held.

The holding portion side groove portion 48 of the holding portion 46 of the dressing member 32 may have a groove shape continuous along the holding portion 46, and a plurality of projecting engagement portion side projections 42 may be fitted into the holding portion side groove portion 48.

Next, a sixth embodiment will be described with reference to fig. 9 to 11. Note that the same components and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

the engaging portion side protrusions 42 provided on the engaging portion 41 of the panel 31 are formed in a plurality of pieces along the engaging portion 41. An engaging claw portion 60 is provided on the inner peripheral surface of the engaging portion 42 on the distal end side so as to protrude. A forming opening 61 for forming the engaging claw portion 60 is formed between the base portion side of each engaging portion side protrusion 42 and the panel portion 40 so as to penetrate in the front-rear direction.

The holding portion side protrusion 49 of the holding portion 46 of the trim member 32 includes an engagement receiving portion 62, corresponding to the engagement portion 41 of the panel 31, with which the engagement claw portion 60 is engaged in a state where the holding portion 46 is recess-projection fitted to the engagement portion 41 of the panel 31. The holding portion side protrusion 49 may be formed in a plurality of parts along the holding portion 46, or may be formed continuously along the holding portion 46.

With this configuration, by combining the panel 31 and the trim member 32, they can be integrated, so that the panel 31 and the trim member 32 can be firmly joined to each other, and the assembling property can be improved.

Next, a seventh embodiment will be described with reference to fig. 12. Note that the same components and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The locking portion 47 of the trim member 32 may be fixed to the back surface side of the cover main body portion 19 by welding.

With this structure, the clip 33 can be omitted, and the number of components can be reduced.

In each embodiment, only the protrusion may be provided on one of the engaging portion 41 of the panel 31 and the holding portion 46 of the trim member 32, only the groove may be provided on the other, and the protrusion may be fitted to the groove in a concavo-convex manner.

Further, the engaging portion 41 of the panel 31 and the holding portion 46 of the trim member 32 are preferably fitted to each other in a concave-convex manner, but only the engaging portion 41 may be engaged with the holding portion 46 without being fitted to each other in a concave-convex manner.

In each embodiment, the cover main body portion 19 is provided with the attachment recess 24 for disposing the marker 20, but when the marker 20 is attached to the cover main body portion 19 so as to protrude, the attachment recess 24 is not necessary.

The airbag device 12 may also serve as an operation portion of a horn switch, for example.

The shape of the cover 18 can be arbitrarily set according to the shape of the steering wheel 10 and the like.