WO2022091768A1 - ステアリングホイール及びその製造方法 - Google Patents
ステアリングホイール及びその製造方法 Download PDFInfo
- Publication number
- WO2022091768A1 WO2022091768A1 PCT/JP2021/037696 JP2021037696W WO2022091768A1 WO 2022091768 A1 WO2022091768 A1 WO 2022091768A1 JP 2021037696 W JP2021037696 W JP 2021037696W WO 2022091768 A1 WO2022091768 A1 WO 2022091768A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base
- main body
- body pillar
- steering wheel
- mounting
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 87
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- 238000000034 method Methods 0.000 claims description 9
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- 239000011347 resin Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
- B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit
- B60R21/2037—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
- B62D7/222—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system acting on the steering wheel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
- F16B21/18—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details
- F16B21/186—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft with circlips or like resilient retaining devices, i.e. resilient in the plane of the ring or the like; Details external, i.e. with contracting action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
- F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
- F16B5/0664—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship at least one of the sheets or plates having integrally formed or integrally connected snap-in-features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/83—Steering input members
Definitions
- the present invention relates to a steering wheel and a method for manufacturing the steering wheel.
- a steering wheel in which an airbag module is attached to the core metal of the steering wheel by a one-touch mounting mechanism such as a snap-fit mechanism is known (see, for example, Patent Documents 1 and 2).
- the airbag module is provided with a pin, while a holding spring (wire-shaped spring) is attached to the core metal. Then, the pin of the airbag module is inserted into the pin hole of the core metal so as to be locked to the holding spring.
- a convex step portion is formed in the base portion of the core metal, a spring insertion hole is formed in the convex step portion, a holding spring is inserted into the spring insertion hole, and an intermediate portion in the longitudinal direction of the holding spring is provided.
- the pin of the airbag module is locked with. Both sides of the holding spring in the longitudinal direction protrude from the spring insertion hole, and it is said that the holding spring is held in the spring insertion hole by engaging the protruding portion with a rib, a protrusion, or the like (the same document). See paragraph 0047 in.).
- Patent Document 1 may be susceptible to vibration from the vehicle depending on the holding mode of the holding spring in the spring insertion hole.
- the mounting of the holding spring may be complicated.
- the steering wheel has a core metal having a boss portion and a base portion having a mounting hole, a rim portion, and a spoke portion connecting the boss portion or the base portion and the rim portion, and mounting.
- An airbag module with a pin to be inserted into the hole, a mounting part to be mounted on the base, and a pin lock located in the mounting hole so that the airbag module is mounted on the core metal.
- the base portion is provided with a spring mounting portion to which the holding spring is mounted, and the spring mounting portion includes a main body pillar portion raised from the base surface of the base portion and a base end side thereof.
- extension part that is continuous with the main body pillar part and extends from the main body pillar part, and the mounting part of the holding spring is located between the base surface and the extension part and sandwiches the main body pillar part.
- the extension portion is attached so as to prevent the holding spring from being pulled out from the attachment portion, and the tip end side of the extension portion is not connected to the base portion.
- the pin of the airbag module when the airbag module is installed on the core metal, the pin of the airbag module is located in the mounting hole of the core metal and is locked to the pin locking portion of the holding spring.
- the holding spring is attached to the spring mounting portion of the base portion of the core metal in a retaining state via the mounting portion. Since the tip end side of the extension portion of the spring mounting portion constituting this retaining portion is not connected to the base portion, vibration from the base portion is not directly input to the tip end side of the extension portion. Therefore, it is possible to reduce the influence of vibration on the holding spring via the portion (extending portion) for preventing the retaining spring.
- the extending portion is formed on the first portion extending to the first side of the main body pillar portion and the second side of the main body pillar portion on the opposite side to the first side. It may have an extended second portion, and each tip side of the first portion and the second portion may be unconnected to the base portion.
- the holding springs can be prevented from coming off on both sides (first side and second side) of the main body pillar portion. As a result, it is possible to improve the retention of the holding spring while reducing the influence of vibration.
- the distance between the tip end side of the first portion and the tip end side of the second portion in the direction orthogonal to the longitudinal direction of the main body pillar portion is larger than the maximum width of the mounting portion in the same direction. May be large.
- the tip end side of the first portion and the tip end side of the second portion may be located outside the mounting portion when viewed from the main body pillar portion, respectively.
- the mounting portion of the holding spring faces at least a part of the first portion and the second portion of the extending portion, and the retaining portion can be configured.
- the gaps between them may each be larger than the wire diameter of the holding spring.
- the holding spring when the holding spring is attached, the holding spring can be passed through the gap of both or one of them. Therefore, the mountability of the holding spring can be improved.
- At least one of the first portion and the second portion may extend in a direction orthogonal to the longitudinal direction of the main body pillar portion.
- first portion and the second portion may be offset in the longitudinal direction of the main body pillar portion.
- the retaining portion can be configured by the first portion and the second portion of the extending portion so that the steps are different in the direction orthogonal to the longitudinal direction of the main body pillar portion. Therefore, it is possible to further improve the retaining mechanism.
- the first part and the second part may differ from each other in at least one size and length.
- the degree of freedom in designing each part of the extension part can be increased.
- the base portion may have openings at positions facing the tip end side of the first portion and the tip end side of the second portion, respectively.
- the weight of the base portion can be reduced.
- the holding spring has a linear portion extending linearly
- the mounting portion has a U-shaped portion having one end connected to the straight portion
- the pin locking portion is one of the straight portions. It may consist of parts.
- the mounting portion of the holding spring further has a curved portion extending in a direction approaching the straight portion from the other end of the U-shaped portion and then extending in a direction away from the straight portion, and the main body pillar portion is a curved portion. It may have a curved side to receive.
- the curved portion of the holding spring is received by the side portion of the main body pillar portion, the attachment of the holding spring in the spring mounting portion is strengthened.
- the steering wheel further comprises a holding member that is attached to the mounting hole, the holding member being arranged in the mounting hole and formed into a cylinder into which a pin is inserted and a cylinder. It has a notch portion, and the pin locking portion is located in the cylinder portion via the notch portion, and the pin may be locked.
- a method for manufacturing a steering wheel includes a base portion having a boss portion, a mounting hole, and a spring mounting portion, a rim portion, and a boss portion or a spoke portion connecting the base portion and the rim portion. It is a core metal provided, and the spring mounting part has a main body pillar portion raised from the base surface of the base portion and an extension portion having a base end side continuous with the main body pillar portion and extending from the main body pillar portion.
- the mounting part of the holding spring is positioned between the base surface and the extending part, mounted so as to sandwich the main body pillar part of the spring mounting part, and held by the extending part with respect to the mounting part.
- the pins provided on the airbag module are mounted. It comprises a step of inserting it into a hole and locking it to a pin locking portion of a holding spring.
- the steering wheel is used to prevent the retaining spring from coming off.
- the influence of vibration on the holding spring through the portion can be reduced.
- the gap created by the non-connection makes it possible to reduce the weight of the base portion of the core metal and improve the mountability of the holding spring.
- the holding spring can be attached after the back cover is molded, which is advantageous in the manufacturing process of the steering wheel.
- FIG. 1 It is a perspective view which shows the appearance of the steering wheel which concerns on embodiment. It is a front perspective view which shows disassembled the core metal and the back cover with respect to the steering wheel which concerns on embodiment, omitting an airbag module. It is a perspective view which shows the airbag module of the steering wheel which concerns on embodiment. It is a perspective view which shows the core metal of the steering wheel which concerns on embodiment from the back side. It is a bottom view of FIG. It is a perspective view which shows the core metal of the steering wheel which concerns on embodiment from the back side, and is the figure which omitted the back cover from FIG. It is a perspective view which shows the core metal of the steering wheel which concerns on embodiment from the back side, and is the figure which omitted the airbag module from FIG.
- (A) is a perspective view of the holding member seen from the diagonally lower side
- (B) is a perspective view of the holding member seen from the diagonally upper side. It is a top view of the holding spring.
- (A) is an enlarged view of FIG. 5 showing an enlarged view of the spring mounting portion
- (B) is an end view cut along the line BB of (A).
- It is a perspective view which shows the back cover of the steering wheel which concerns on embodiment from the back side.
- It is a flowchart which shows the manufacturing method of the steering wheel which concerns on embodiment. It is a figure which shows the flow of the process of attaching a holding spring to the back side of a core metal.
- the steering wheel is located on the driver's side of a vehicle such as an automobile and has multiple functions.
- the steering wheel has a function as a steering device of a vehicle.
- the steering wheel is generally mounted on the upper end of a steering shaft provided on the vehicle body in an inclined state. The steering force from the driver is transmitted from the steering wheel to the steering shaft, transmitted to the wheels via the steering gear and the like, and the direction of the wheels is changed.
- the steering wheel has a function as a front airbag in case of a vehicle emergency.
- the vehicle emergency means, for example, the time when a vehicle collision occurs.
- the function as a front airbag is mainly achieved by an airbag module installed in the core metal of the steering wheel.
- the steering wheel may have a function as a horn device and a function as a dynamic damper for attenuating vibration from the vehicle to the steering wheel.
- the function as a dynamic damper is achieved, for example, by a damper unit provided between the airbag module and the core metal.
- the three axes of XYZ are defined as follows.
- the axial direction of the steering shaft is "Z-axis direction”
- the direction connecting 9 o'clock and 3 o'clock of the analog 12-hour clock on the plane orthogonal to the Z-axis direction is "X-axis direction”
- 12 o'clock of the same clock is defined as the "Y-axis direction”.
- the X-axis direction can be the direction corresponding to the width direction of the steering wheel or the vehicle.
- a plane composed of the X-axis and the Y-axis is referred to as an "XY plane".
- the first direction of the Z-axis is toward the lower end side of the steering shaft, and the second direction of the Z-axis is toward the upper end side (driver side) of the steering shaft. Further, the first direction of the Z-axis is toward the back side of the core metal, and the second direction of the Z-axis is toward the front side of the core metal.
- the steering wheel 1 has a core metal 2 and an airbag module 3.
- the airbag module 3 is assembled in the center of the front side of the core metal 2.
- a back cover 4 is provided on the back side of the core metal 2.
- the core metal 2 constitutes the skeleton portion of the steering wheel 1 and forms the shape of the steering wheel 1.
- the core metal 2 has a base portion 21 having a central boss portion 20, an annular rim portion 22 gripped by the driver, and a spoke portion 23 connecting the boss portion 20 or the base portion 21 and the rim portion 22.
- the boss portion 20 is connected to the steering shaft.
- the base portion 21 is a portion including the boss portion 20 in the center, and has a plurality of (three in this case) mounting holes 24, 24, 24 for mounting the airbag module 3 in the peripheral portion of the boss portion 20. ing. Each mounting hole 24 penetrates the base portion 21.
- the core metal 2 is formed of, for example, a metal such as iron, aluminum, magnesium, a resin, or the like.
- the core metal 2 is provided with a layer of a soft synthetic resin coating such as a foamed polyurethane resin so as to cover a part or all of the core metal 2.
- Such layers may be a plurality of layers. For example, a urethane layer as an insulating layer, a layer of a heater electrode for a heater function for heating the steering wheel 1, a skin layer as an insulating layer, and a steering wheel 1 by the driver are sequentially directed toward the outside of the core metal 2.
- a layer of sensor electrodes for detecting the grip of the wheel may be provided.
- the back cover 4 hides a part of the core metal 2 from the back side of the core metal 2.
- the back cover 4 covers the peripheral portions of the boss portion 20 and the spoke portions 23 on the back side of the core metal 2 so that the boss portion 20 and the spoke portions 23 of the core metal 2 cannot be seen from the outside (driver). ..
- the back cover 4 is molded from a resin material.
- the back cover 4 is molded of urethane. As will be described later, the back cover 4 is integrally molded on the back side of the core metal 2.
- the airbag module 3 has a retainer 31 for accommodating a folded airbag cushion, an inflator 32 supported by the retainer 31, and a folded airbag cushion and an inflator 32 from the driver side. It has a module cover 33 for covering.
- a known configuration can be adopted for the retainer 31, the inflator 32 and the module cover 33.
- the inflator 32 is attached to the center of the bottom surface 35 along the XY surface, and the module cover 33 is attached to the peripheral wall rising from the bottom surface 35 by a fastener.
- the inflator 32 has a low profile hollow disk having a gas ejection hole.
- the module cover 33 can function as a horn switch pushed by the driver when the horn is sounded.
- the inflator 32 receives a signal from the vehicle sensor and operates to supply gas to the airbag cushion.
- the airbag cushion which has been supplied with gas, rapidly expands and bursts the module cover 33, expands toward the driver side of the vehicle interior space, and restrains the driver.
- the airbag module 3 has a plurality of (three here) pins 41, 41, 41.
- the pin 41 is for connecting the airbag module 3 and the core metal 2.
- the three pins 41 are provided at positions corresponding to the three mounting holes 24 of the core metal 2.
- the three pins 41 are arranged in the 3 o'clock, 6 o'clock and 9 o'clock directions when the airbag module 3 is viewed on an analog 12-hour clock in a plane orthogonal to the Z-axis direction.
- the pin 41 is provided so as to project from the bottom surface 35 of the retainer 31 toward the first direction of the Z-axis (core metal 2 side), and can be inserted into the mounting hole 24 of the core metal 2.
- a locking groove 42 is formed at the tip of the pin 41 in a direction orthogonal to the axial direction of the pin 41.
- the locking groove 42 is formed in an annular shape over the circumferential direction of the pin 41.
- the locking groove 42 is locked by a holding spring 52 (see FIG. 4) described later when the airbag module 3 is attached to the core metal 2.
- a coil spring 44 is provided on the base end side of the pin 41 so as to surround the outer circumference of the pin 41.
- One end side of the coil spring 44 is held by the bottom surface 35 of the retainer 31, and the other end side is a free end.
- the airbag module 3 can be displaced relative to the core metal 2 by the coil spring 44 (particularly, it can move forward and backward in the Z-axis direction). Therefore, the coil spring 44 can function as a damper unit that transmits the vibration of the core metal 2 from the vehicle body to the airbag module 3.
- the coil spring 44 also functions advantageously when the module cover 33 functions as a horn switch. For example, when the module cover 33 is pushed by the driver in the first direction of the Z axis, the airbag module 3 approaches the base portion 21 against the urging force of the coil spring 44. At this time, the contacts provided in each of the airbag module 3 and the base portion 21 can be electrically conducted to sound the horn.
- FIGS. 4 to 7 show the core metal 2 from the back side.
- FIG. 6 is a diagram in which the back cover 4 is omitted from FIG. 4
- FIG. 7 is a diagram in which the airbag module 3 is omitted from FIG.
- holding members 51, 51, 51 are attached to the attachment holes 24, 24, 24 of the base portion 21 of the core metal 2, respectively.
- holding springs 52, 52, 52 are provided in the vicinity of the three mounting holes 24, 24, 24, respectively.
- the holding member 51 has a tubular portion 61 and a notch portion 62 formed in the tubular portion 61. Further, the holding member 51 has a flange portion 63 protruding in a ring shape from the outer peripheral surface on one end side of the tubular portion 61.
- the holding member 51 functions as a collar formed of, for example, synthetic resin, and holds a relative position or distance between the pin 41 of the airbag module 3 and the mounting hole 24 of the core metal 2.
- the tubular portion 61 is arranged in the mounting hole 24.
- the tubular portion 61 is formed in a substantially cylindrical shape, and is configured so that a pin 41 can be inserted inside.
- the notch 62 is formed by notching the middle of the cylinder 61 in the axial direction so as to communicate the inside and the outside of the cylinder 61.
- the notch portion 62 is cut out to substantially half of the cylinder portion 61 in a direction orthogonal to the axial direction of the cylinder portion 61, and the inside of the cylinder portion 61 is formed in a direction orthogonal to the axial direction of the cylinder portion 61. It communicates with the outside.
- the flange portion 63 is in contact with the opening edge of the mounting hole 24 (see: FIG. 10B). Specifically, the flange portion 63 abuts on the surface 21a of the base portion 21 on the front side of the core metal 2 to prevent the holding member 51 from falling out of the mounting hole 24 to the back side of the core metal 2.
- the holding spring 52 is formed of a wire rod such as metal, and is configured to be elastically deformable.
- the holding spring 52 has a mounting portion 71 attached to the base portion 21 of the core metal 2 and a pin locking portion 72 for locking the pin 41 of the airbag module 3.
- the mounting portion 71 has a substantially U-shaped portion 82, and the pin locking portion 72 is composed of a linear portion.
- the holding spring 52 has a straight portion 81 extending linearly.
- the mounting portion 71 has a substantially U-shaped portion 82 having one end connected to the straight portion 81, and a curved portion 73 extending from the other end of the substantially U-shaped portion 82.
- the straight portion 81 has an inclined portion 84 slightly inclined in a direction away from the curved portion 73 on the tip end side.
- a part of the straight line portion 81 is a pin locking portion 72.
- the pin locking portion 72 is a part of the straight portion 81 between the inclined portion 84 and the mounting portion 71.
- the substantially U-shaped portion 82 of the mounting portion 71 includes a first arm portion 82a on an extension of the straight portion 81, a second arm portion 82b facing the first arm portion 82a, and a first arm portion 82a and a second arm. It has a connecting portion 82c that connects the portions 82b.
- the second arm portion 82b is curved outward.
- the first arm portion 82a and the second arm portion 82b can be elastically deformed from each other in the separation direction.
- the curved portion 73 extends from the end of the second arm portion 82b in a direction approaching the straight portion 81, and then extends in a direction away from the straight portion 81. That is, the curved portion 73 is curved inward, contrary to the second arm portion 82b.
- the pin locking portion 72 is configured to be lockable in the locking groove 42 of the pin 41 of the airbag module 3.
- the pin locking portion 72 is located in the tubular portion 61 of the holding member 51 via the notch 62 of the holding member 51, and locks the pin 41.
- a restoring force acts on the pin locking portion 72 to prevent the pin 41 from coming off.
- the pin locking portion 72 is pushed outward by the locking groove 42.
- the straight line portion 81 having the pin locking portion 72 in the middle is connected to the substantially U-shaped portion 82, a restoring force acts on the pin locking portion 72. In this way, the pin locking portion 72 is locked in the locking groove 42, and the airbag module 3 is installed in the core metal 2.
- the spring mounting portion 90 is provided on the base portion 21 of the core metal 2. Specifically, the spring mounting portion 90 is formed on the back side of the base portion 21 in the vicinity of each mounting hole 24 (see: FIG. 7).
- the spring device unit 90 has a main body pillar portion 91 that rises from the base surface 21b of the base portion 21, and an extension portion 92 that extends from the main body pillar portion 91.
- the base surface 21b constitutes the back surface of the base portion 21, and is formed so that the main body pillar portion 91 and the boss portion 20 project from the base surface 21b in the first direction of the Z axis (see FIG. 7). ..
- the mounting portion 71 of the holding spring 52 is mounted on the main body pillar portion 91 so that the tip end side thereof is sandwiched.
- the connecting portion 82c of the mounting portion 71 is in contact with the tip surface 91a of the main body pillar portion 91, and the first arm portions 82a and the second arm portion 82a of the mounting portion 71 are on both side surfaces on the tip end side of the main body pillar portion 91.
- the arm portions 82b are in contact with each other or face each other, and a substantially U-shaped portion 82 is attached to the tip end side of the main body pillar portion 91.
- the main body pillar portion 91 has a side portion 91d curved so as to receive the curved portion 73 of the mounting portion 71, and a linear side portion 91e on the side opposite to the side portion 91d.
- the side portion 91d is curved inward toward the side portion 91e.
- the curved portion 73 is pushed outward by the side portion 91d, a restoring force acts on the curved portion 73, and the curved portion 73 is pressed against the side portion 91d.
- the holding spring 52 is prevented from coming off in the longitudinal direction of the main body pillar portion 91.
- the mounting portion 71 may be mounted on the main body pillar portion 91 so as not to come off in the longitudinal direction of the main body pillar portion 91 by using the substantially U-shaped portion 82.
- the extension portion 92 has a base end side continuous with the main body pillar portion 91 and a tip end side is not connected to the base portion 21.
- the extending portion 92 extends to both sides of the main body pillar portion 91 on the tip end side of the main body pillar portion 91.
- the extending portion 92 has a first portion 101 extending to the first side of the main body pillar portion 91 and a second side of the main body pillar portion 91 opposite to the first side.
- the second portion 102 is extended to the base portion 21, and the tip end side of the first portion 101 and the second portion 102 is not connected to the base portion 21.
- the first portion 101 and the second portion 102 extend in a direction orthogonal to the longitudinal direction of the main body pillar portion 91. Further, the first portion 101 and the second portion 102 are offset in the longitudinal direction of the main body pillar portion 91. Here, the first portion 101 is located closer to the tip of the main body pillar portion 91 than the second portion 102.
- first portion 101 and the second portion 102 may be extended in a direction other than the direction orthogonal to the longitudinal direction of the main body pillar portion 91. Further, it is also possible to omit one of the first portion 101 and the second portion 102 to form an extension portion 92 extending only from one side of the main body pillar portion 91.
- the first portion 101 and the second portion 102 extend from a part of the main body pillar portion 91 in the height direction, and are between the first portion 101 and the second portion 102 and the base surface 21b of the base portion 21. Consists of a space for the holding spring 52.
- the first portion 101 and the second portion 102 extend parallel to the base surface 21b from a portion of the main body pillar portion 91 in the first direction of the Z axis.
- a gap is formed between the lower surfaces of the first portion 101 and the second portion 102 and the base surface 21b so that the mounting portion 71 of the holding spring 52 can be positioned.
- the first portion 101 and the second portion 102 form a retaining spring 52 with respect to the mounting portion 71.
- the first portion 101 is located on the lower side (Z-axis first direction) of the first arm portion 82a of the mounting portion 71, and contacts the first arm portion 82a to form a retaining spring 52.
- the second portion 102 is located on the lower side (Z-axis first direction) of the second arm portion 82b of the mounting portion 71, and contacts the second arm portion 82b to form a retaining spring 52. ..
- the shape, size, dimensions, etc. of the first portion 101 and the second portion 102 have been devised in order to construct such a retaining.
- the distance between the tip end side of the first portion 101 and the tip end side of the second portion 102 in the direction orthogonal to the longitudinal direction of the main body pillar portion 91 is larger than the maximum width of the mounting portion 71 in the same direction. It has become.
- the maximum width of the mounting portion 71 is here the distance between the first arm portion 82a and the outermost curved portion of the second arm portion 82b. From another point of view, it can be said that the tip end side of the first portion 101 and the tip end side of the second portion 102 are located outside the mounting portion 71 when viewed from the main body pillar portion 91, respectively.
- the gap between the tip side of the first portion 101 and the base portion 21 facing each other in the unconnected state, and the gap between the tip side of the second portion 102 and the base portion 21 facing the base portion 21 in the unconnected state are , Each of which is larger than the wire diameter of the holding spring 52.
- the tip end side of the first portion 101 is farther from the portion in the base portion 21 than the wire diameter of the holding spring 52.
- the tip end side of the second portion 102 is farther from the portion in the base portion 21 than the wire diameter of the holding spring 52.
- the first part 101 and the second part 102 are different from each other in at least one size and length.
- the first portion 101 is slightly thicker and longer than the second portion 102.
- the first portion 101 and the second portion 102 may have the same size and length.
- the base portion 21 has openings 111 and 112 at positions facing the tip end side of the first portion 101 and the tip end side of the second portion 102, respectively.
- the openings 111 and 112 are substantially square openings, which face the entire first portion 101 and the second portion 102, respectively. Therefore, the main body pillar portion 91 is raised from the portion of the base surface 21b between the opening portion 111 and the opening portion 112.
- the base portion 21 has an opening 113 on the opposite side of the opening 111 with the mounting hole 24 interposed therebetween.
- the opening 113 is also a substantially square opening.
- the opening 113 faces a part of the straight portion 81 of the holding spring 52 (the straight portion of the straight portion 81, the inclined portion 84, and / or the boundary between the straight portion and the inclined portion 84).
- the end portion of the holding spring 52 (the end portion of the inclined portion 84) extends beyond the opening 113 and is located on the base surface 21b or faces the base surface 21b.
- the main body pillar portion 91 extends toward the side opposite to the tip surface 91a, and has a bridge portion 120 extending in a direction orthogonal to the longitudinal direction of the main body pillar portion 91 on the side opposite to the tip surface 91a.
- the bridge portion 120 extends in the same direction as the first portion 101 of the extension portion 92, crosses the opening 113, and is connected to the boss portion 20.
- the bridge portion 120 is configured so that its lower side (opening 113 side) can pass through the straight portion 81 of the holding spring 52.
- main body pillar portion 91 is curved in a semicircular shape toward the second portion 102 side of the extending portion 92 at a position corresponding to the mounting hole 24 between the tip surface 91a and the bridge portion 120.
- the main body pillar portion 91 may be a portion that extends linearly along the longitudinal direction.
- the substantially U-shaped portion 82 of the mounting portion 71 is attached to the tip end side of the main body pillar portion 91, and the side portion 91d of the main body pillar portion 91.
- the curved portion 73 of the mounting portion 71 is received, and a part of the straight portion 81 comes into contact with or faces the side portion 91e of the main body pillar portion 91.
- the first portion 101 and the second portion 102 of the extending portion 92 form a retaining spring 52 with respect to the mounting portion 71.
- the bridge portion 120 also constitutes a retaining spring 52 with respect to the straight portion 81.
- the pin locking portion 72 of the holding spring 52 is inserted into the notch portion 62 of the holding member 51.
- the pin locking portion 72 is elastically deformed by the pin 41, and the restoring force of the pin 41 elastically deforms the locking groove of the pin 41. Locked to 42.
- the back cover 4 is integrally molded on the back side of the core metal 2, and hides a part of the core metal 2.
- the back cover 4 has spoke cover portions 131, 132, 133 that cover the spoke portions 23 of the core metal 2.
- the back cover 4 has a peripheral wall portion 135 that surrounds the peripheral edge of the base portion 21 of the core metal 2.
- the peripheral wall portion 135 rises from the peripheral edge of the base portion 21 in the first direction of the Z axis, and is connected to the spoke cover portions 131, 132, 133 at the portion on the root side thereof.
- the core metal 2 is molded by casting (S11).
- the back cover 4 is formed on the back side of the core metal 2 with a resin material (S12).
- the core metal 2 is set in a mold, and the back cover 4 is insert-molded with urethane.
- the back cover 4 is integrally molded on the back side of the core metal 2.
- the holding member 51 is attached to the attachment hole 24 of the core metal 2 (S13). Specifically, the tubular portion 61 of the holding member 51 is inserted into the mounting hole 24 from the front side of the core metal 2, and the flange portion 63 is brought into contact with the surface 21a of the base portion 21.
- the holding spring 52 is attached to the back side of the core metal 2 (S14).
- the flow of this example will be described with reference to FIG.
- the end of the holding spring 52 (the end of the inclined portion 84) is directed toward the opening 113 (FIG. 13A), inserted into the opening 113, and the holding spring 52 is placed in a horizontal posture on the base surface 21b. (FIG. 13 (B)).
- the holding spring 52 is provided because the tip end side of the first portion 101 of the extending portion 92 is not connected to the base portion 21 and the gap between the extending portion 92 and the first portion 101 is larger than the wire diameter of the holding spring 52. It can be positioned on the base surface 21b by passing through the gap.
- the holding spring 52 is moved toward the mounting hole 24, and the pin locking portion 72 is inserted into the tubular portion 61 of the holding member 51 via the notch portion 62 (FIG. 13 (C)). As a result, the pin locking portion 72 is positioned in the mounting hole 24.
- the holding spring 52 is rotated 90 degrees (FIG. 13 (D)). Then, the mounting portion 71 of the holding spring 52 is located between the base surface 21b and the extending portion 92. Finally, the holding spring 52 is horizontally moved on the base surface 21b (FIG. 13 (E)), the mounting portion 71 is mounted so as to sandwich the main body pillar portion 91, and the holding spring 52 is attached to the mounting portion 71 by the extending portion 92.
- the mounting step (S14) of the holding spring 52 is completed.
- the holding spring 52 can be attached in the central portion of the core metal 2 even when the back cover 4 is formed on the core metal 2.
- the airbag module 3 on the front side of the core metal 2 (S15). Specifically, the core metal 2 to which the holding spring 52 is attached is turned inside out so that the front side of the core metal 2 faces the pin 41 of the airbag module 3. Depending on the mounting mode of the holding spring 52 and the mounting mode of the holding member 51 described above, the holding member 51 and the holding spring 52 are prevented from falling from the core metal 2 even if the core metal 2 is turned inside out.
- the pin 41 of the airbag module 3 is inserted into the tubular portion 61 in the mounting hole 24, and the pin locking portion 72 is locked in the locking groove 42. That is, it is snap-fitted. As a result, the airbag module 3 is assembled to the core metal 2, and the steering wheel 1 is manufactured.
- the base portion 21 of the core metal 2 is provided with a spring mounting portion 90 to which the holding spring 52 is attached.
- the spring mounting portion 90 has a main body pillar portion 91 that rises from the base surface 21b of the base portion 21, and an extension portion 92 whose base end side is continuous with the main body pillar portion 91 and extends from the main body pillar portion 91. ..
- the mounting portion 71 of the holding spring 52 is located between the base surface 21b and the extending portion 92, and is mounted so as to sandwich the main body pillar portion 91.
- the extending portion 92 constitutes a retaining spring 52 with respect to the mounting portion 71, and the tip end side of the extending portion 92 is not connected to the base portion 21.
- the extending portion 92 of the spring mounting portion 90 constituting the holding spring 52 to prevent it from coming off is not connected to the base portion 21 on the tip end side thereof, the tip end side of the extending portion 92 is not connected.
- the vibration from the base portion 21 is not directly input to the. Therefore, it is possible to reduce the influence of vibration on the holding spring 52 via the portion for preventing the retaining spring (extending portion 92).
- a gap is created between the tip end side of the extension portion 92 and the base portion 21 due to such non-connection, it is possible to contribute to the weight reduction of the base portion 21 and to improve the mountability of the holding spring 52. Can also contribute.
- the holding spring 52 can be attached after the back cover 4 is molded, which is advantageous in the manufacturing process of the steering wheel 1.
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- Air Bags (AREA)
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Abstract
Description
Claims (15)
- ボス部及び取付け孔を有するベース部と、リム部と、前記ボス部又は前記ベース部と前記リム部とを連結するスポーク部と、を備えた芯金と、
前記取付け孔内に挿入されるピンを有するエアバッグモジュールと、
前記ベース部に取り付けられる取付け部と、前記エアバッグモジュールが前記芯金に設置されるように前記取付け孔内に位置して前記ピンを係止するピン係止部と、を有する保持スプリングと、
を備え、
前記ベース部には、前記保持スプリングが取り付けられるスプリング装着部が設けられ、
前記スプリング装着部は、
前記ベース部のベース面から隆起した本体柱部と、
基端側が前記本体柱部に連続し、前記本体柱部から延出された延出部と、を有し、
前記保持スプリングの前記取付け部は、前記ベース面と前記延出部との間に位置して、前記本体柱部を挟むようにして取り付けられ、
前記延出部は、前記取付け部に対して前記保持スプリングの抜止めを構成し、
前記延出部の先端側は、前記ベース部に非連結となっている、ステアリングホイール。 - 前記延出部は、
前記本体柱部の第1の側に延出された第1部分と、
前記第1の側とは反対側の、前記本体柱部の第2の側に延出された第2部分と、を有し、
前記第1部分及び前記第2部分の各先端側が、前記ベース部に非連結となっている、請求項1に記載のステアリングホイール。 - 前記本体柱部の長手方向に直交する方向における、前記第1部分の先端側と前記第2部分の先端側との間の距離は、同方向における、前記取付け部の最大幅よりも大きい、請求項2に記載のステアリングホイール。
- 前記第1部分の先端側及び前記第2部分の先端側は、それぞれ、前記本体柱部から見て、前記取付け部よりも外側に位置している、請求項2に記載のステアリングホイール。
- 前記第1部分の先端側とこれが非連結状態で対向する前記ベース部との間の隙間、及び、前記第2部分の先端側とこれが非連結状態で対向する前記ベース部との間の隙間は、それぞれ、前記保持スプリングの線径よりも大きい、請求項2から4のいずれか一項に記載のステアリングホイール。
- 前記第1部分及び前記第2部分の少なくとも一つは、前記本体柱部の長手方向に直交する方向に延出されている、請求項2から5のいずれか一項に記載のステアリングホイール。
- 前記第1部分と前記第2部分とは、前記本体柱部の長手方向においてオフセットされている、請求項6に記載のステアリングホイール。
- 前記第1部分と前記第2部分とは、サイズ及び長さの少なくとも一つが互いに異なる、請求項2から7のいずれか一項に記載のステアリングホイール。
- 前記ベース部は、前記第1部分の先端側及び前記第2部分の先端側に対向する位置にそれぞれ開口部を有している、請求項2から8のいずれか一項に記載のステアリングホイール。
- 前記保持スプリングは、直線的に延びる直線部を有し、
前記取付け部は、一端が前記直線部につながる略U字状部分を有し、
前記ピン係止部は、前記直線部の一部からなる、請求項1から9のいずれか一項に記載のステアリングホイール。 - 前記取付け部は、前記略U字状部分の他端から前記直線部に近づく方向に延び、かつ、その後、前記直線部から離れる方向に延びる湾曲部をさらに有し、
前記本体柱部は、前記湾曲部を受けるように湾曲した側部を有する、請求項10に記載のステアリングホイール。 - 前記取付け孔に取り付けられる保持部材をさらに有し、
前記保持部材は、
前記取付け孔内に配置され、前記ピンが挿入される筒部と、
前記筒部に形成された切欠き部と、を有し、
前記ピン係止部は、前記切欠き部を介して前記筒部内に位置され、前記ピンを係止する、請求項1から11のいずれか一項に記載のステアリングホイール。 - ボス部、取付け孔及びスプリング装着部を有するベース部と、リム部と、前記ボス部又は前記ベース部と前記リム部とを連結するスポーク部と、を備えた芯金であって、前記スプリング装着部が、前記ベース部のベース面から隆起した本体柱部と、基端側が前記本体柱部に連続し、前記本体柱部から延出された延出部と、を有し、前記延出部の先端側が、前記ベース部に非連結となっている、当該芯金の裏側にバックカバーを樹脂材料により成形する工程と、
前記バックカバーが成形された前記芯金の裏側に保持スプリングを取り付ける工程であって、前記保持スプリングの取付け部を、前記ベース面と前記延出部との間に位置させて、前記スプリング装着部の前記本体柱部を挟むようにして取り付け、前記延出部によって前記取付け部に対して前記保持スプリングの抜止めを構成すると共に、前記保持スプリングのピン係止部を前記取付け孔内に位置させる工程と、
前記芯金の表側にエアバッグモジュールを組み付ける工程であって、前記エアバッグモジュールに設けたピンを前記取付け孔内に挿入して、前記保持スプリングの前記ピン係止部に係止させる工程と、
を含む、ステアリングホイールの製造方法。 - 前記バックカバーは、前記ベース部の周縁を囲繞する周壁部を有する、請求項13に記載のステアリングホイールの製造方法。
- 前記バックカバーを成形する工程の後に、
前記取付け孔内に配置される筒部と、前記筒部に形成された切欠き部とを有する保持部材を前記取付け孔に取り付ける工程をさらに含み、
前記バックカバーが成形された前記芯金の裏側に前記保持スプリングを取り付ける工程では、前記保持スプリングの前記ピン係止部を前記切欠き部を介して前記筒部内に挿入し、
前記芯金の表側に前記エアバッグモジュールを組み付ける工程では、前記エアバッグモジュールの前記ピンを前記筒部内に挿入して、前記保持スプリングの前記ピン係止部に係止させる、請求項13又は14に記載のステアリングホイールの製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP21885887.6A EP4234364A1 (en) | 2020-10-26 | 2021-10-12 | Steering wheel and method of manufacturing same |
KR1020237016353A KR20230093450A (ko) | 2020-10-26 | 2021-10-12 | 스티어링 휠 및 그 제조 방법 |
US18/250,681 US20230406252A1 (en) | 2020-10-26 | 2021-10-12 | Steering wheel and method of manufacturing same |
CN202180071102.0A CN116529130A (zh) | 2020-10-26 | 2021-10-12 | 方向盘及其制造方法 |
JP2022558979A JP7503644B2 (ja) | 2020-10-26 | 2021-10-12 | ステアリングホイール及びその製造方法 |
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EP (1) | EP4234364A1 (ja) |
JP (1) | JP7503644B2 (ja) |
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US20220314919A1 (en) * | 2019-07-04 | 2022-10-06 | Autoliv Development Ab | Device for removably mounting an airbag module on a steering wheel |
WO2024171688A1 (ja) * | 2023-02-15 | 2024-08-22 | オートリブ ディベロップメント エービー | 車両用ステアリングホイール装置 |
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2021
- 2021-10-12 KR KR1020237016353A patent/KR20230093450A/ko unknown
- 2021-10-12 WO PCT/JP2021/037696 patent/WO2022091768A1/ja active Application Filing
- 2021-10-12 US US18/250,681 patent/US20230406252A1/en active Pending
- 2021-10-12 JP JP2022558979A patent/JP7503644B2/ja active Active
- 2021-10-12 EP EP21885887.6A patent/EP4234364A1/en active Pending
- 2021-10-12 CN CN202180071102.0A patent/CN116529130A/zh active Pending
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Also Published As
Publication number | Publication date |
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KR20230093450A (ko) | 2023-06-27 |
CN116529130A (zh) | 2023-08-01 |
JP7503644B2 (ja) | 2024-06-20 |
US20230406252A1 (en) | 2023-12-21 |
EP4234364A1 (en) | 2023-08-30 |
JPWO2022091768A1 (ja) | 2022-05-05 |
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