KR20170086375A - Steering wheel for vehicle - Google Patents

Steering wheel for vehicle Download PDF

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Publication number
KR20170086375A
KR20170086375A KR1020160006148A KR20160006148A KR20170086375A KR 20170086375 A KR20170086375 A KR 20170086375A KR 1020160006148 A KR1020160006148 A KR 1020160006148A KR 20160006148 A KR20160006148 A KR 20160006148A KR 20170086375 A KR20170086375 A KR 20170086375A
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KR
South Korea
Prior art keywords
steering wheel
coil spring
airbag module
coil
wheel skeleton
Prior art date
Application number
KR1020160006148A
Other languages
Korean (ko)
Other versions
KR101781388B1 (en
Inventor
이원석
오제형
Original Assignee
아우토리브 디벨롭먼트 아베
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 아우토리브 디벨롭먼트 아베 filed Critical 아우토리브 디벨롭먼트 아베
Priority to KR1020160006148A priority Critical patent/KR101781388B1/en
Publication of KR20170086375A publication Critical patent/KR20170086375A/en
Application granted granted Critical
Publication of KR101781388B1 publication Critical patent/KR101781388B1/en

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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/12—Push-buttons
    • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
    • H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Air Bags (AREA)
  • Steering Controls (AREA)

Abstract

The steering wheel of the vehicle is an airbag module; Steering wheel skeleton; A coil spring disposed between the airbag module and the steering wheel skeleton to movably support the airbag module along a central axis direction of the steering wheel skeleton; a movable contact member provided in the airbag module; And a stationary contact member disposed on the steering wheel skeleton so as to correspond to the movable contact member, wherein the coil spring has a densely coiled portion whose center portion has a coil pitch with a coil pitch relatively smaller than that at both ends. With this configuration, it is possible to reduce the vibration of the coil spring due to the external impact, thereby reducing the generation of noise due to the coil spring being struck against the structure of the steering wheel skeleton or the airbag module side.

Description

A steering wheel of a vehicle {STEERING WHEEL FOR VEHICLE}

The present invention relates to a steering wheel of an automobile having an improved structure of a coil spring that elastically supports an airbag module in a direction opposite to a steering wheel skeleton with respect to a steering wheel skeleton.

The steering wheel of most vehicles includes a steering wheel body rigidly connected to the steering column and at least one movable member that can be pushed down against the force of the return member relative to the steering wheel body, The horn contact is connected.

In most cases, the movable member that can be depressed down is an airbag module or a portion of an airbag module.

When the movable member is an airbag module, the assembly including the entire airbag module, i.e., substantially the housing, the airbag housed in the folded state in the housing, the inflator connected to the housing, and the cover member covering the housing is returned by the return member and the guide member, And is fixed to the body side.

The return member includes a spring that is installed in a compressed state between the airbag module and the steering wheel body to provide an elastic force in a direction away from the steering wheel body.

Such a spring is contracted by the airbag module which is urged downward, and in this case, the movable contact and the stationary contact of the contact unit come into contact with each other and a horn is sounded.

The spring provided in the horn switch device of the steering wheel is formed into a coil shape in which a single steel wire is wound in a spiral shape, and in the course of elongation or contraction, the flow width of the upper, lower, left, So that noise is generated.

United States Patent Application Publication No. 2002-0153714 Japanese Patent Publication No. 2011-63167

An object of the present invention is to provide a steering wheel of an automobile which improves the structure of a coil spring interposed between an airbag module and a steering wheel of an automobile to reduce noise generation.

According to an aspect of the present invention, there is provided an airbag module comprising: an airbag module; Steering wheel skeleton; A coil spring disposed between the airbag module and the steering wheel skeleton and movably supporting the airbag module along the central axis direction of the steering wheel skeleton; A movable contact member provided in the airbag module; And a stationary contact member disposed on the steering wheel skeleton so as to correspond to the movable contact member, wherein the coil spring has a center portion of the coil spring including a densely coiled portion having a coil pitch with a coil pitch relatively smaller than both ends, A steering wheel is provided.

The windings of the dense coil part can contact each other.

Wherein a pin member protrudes from a lower portion of a housing accommodating the airbag of the airbag module in a folded state, and a through hole through which the pin member passes is formed on the steering wheel skeleton, the coil spring is inserted into the pin member, And can be compressed between the lower surface of the housing and the upper surface around the through hole of the steering wheel skeleton.

The upper portion of the densely coiled portion of the coil spring may be wound in a cylindrical shape so as to be fitted and fixed to the outer circumference of the pin member.

The densely coiled portion and the lower portion of the coil spring may have a shape in which an average diameter of the coil increases toward the steering wheel skeleton.

According to an embodiment of the present invention, the coil pitch is relatively small in the middle portion of the coil spring interposed between the airbag module and the steering wheel skeleton, and the coil pitch is relatively small compared to both ends, The noise can be reduced.

1 is a cross-sectional view showing the configuration of a steering wheel of an automobile according to an embodiment of the present invention.
2 is an enlarged view of the II display portion of Fig.
3 is a perspective view showing the configuration of a coil spring according to an embodiment of the present invention.
Figure 4 is a side view of the coil spring of Figure 3;
5 is a cross-sectional view showing the configuration of a steering wheel of an automobile according to another embodiment of the present invention.
6 is an enlarged view of the VI display portion of Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

Referring to FIG. 1, the steering wheel 1 includes a steering wheel skeleton 10 and an airbag module 30.

The steering wheel skeleton body 10 is connected to the steering wheel hub 11 by means of a cup-shaped steering wheel hub 11, a plurality of steering wheel spokes 13 extending from the steering wheel hub 11 and a steering wheel spoke 13, And a steering wheel rim 15 wrapped in a foam form. A sleeve 12 is protruded from the lower end of the steering wheel hub 11 so as to be fitted in a steering column (not shown) along the center axis A of the steering wheel hub 11.

The airbag module 30 includes an inflator 31 for generating gas, an airbag housing 34 having a base portion 33 on which the inflator 31 is supported, an airbag 35 housed in the housing 34 in a folded state, And a cover member 37 that covers the opening of the cover member 34.

The horn switch device 100 is installed between the base 33 and the steering wheel hub 11. [ The airbag module 30 is installed so as to be movable upward and downward along the direction of the vertical center axis A of the steering wheel hub 11 for the operation of the horn switch device 100. [

2 is an enlarged view of the II display portion of Fig.

2, the horn switch device 100 includes a base portion 34a of the housing 34 of the airbag module 30 and a coil spring 110 and a base portion (not shown) provided between the steering wheel hub 11 And a contact unit (130) for operating the horn device (H) when the horn device (34a) is moved downward.

A pin member 36 protrudes below the base portion 34a of the housing 34 and a through hole 11a through which the pin member 36 passes is formed in the steering wheel hub 11.

The contact unit 130 includes a movable contact member 131 provided on the base portion 34a side of the housing 34 and a fixed contact member 131 disposed on the steering wheel hub 11 to face the movable contact member 131 133).

The contact unit may include a contact pin projecting from the lower portion of the base portion 34a of the housing 34 and protruding from the steering wheel hub 11 through the steering wheel hub 11 and a contact pin And a contact wire disposed at a predetermined position around the through hole of the wheel hub 11. With this configuration, when the airbag module 30 moves downward, the contact pins are moved downward together to cause the horn device H to operate by contacting or dropping contact wire located at a predetermined position of the steering wheel hub 11 .

In still another embodiment, the contact unit may include a membrane horn switch method. The membrane horn switch may comprise two thin sheets having a conductive layer separated by a thin spacer. Such a membrane horn switch can be employed on the inner surface of the cover member. When pressure is applied to such a membrane horn switch, the two conductive layers may contact each other to close the horn circuit to operate the horn device.

The base portion 34a of the housing 34 is pressed against the center of the steering wheel hub 11 by the elastic force of the coil spring 110 interposed between the base portion 34a of the housing 34 and the steering wheel hub 11, The movable contact member 131 and the stationary contact member 133 are held apart from each other by being supported to move upward along the axis A direction.

When the user moves the downward movement of the airbag module 30 by pressing the cover member 37 of the airbag module 30 in a state where the movable contact member 131 and the fixed contact member 133 are separated from each other, The movable contact member 131 provided at the lower end of the base portion 34a of the movable contact member 34 is brought into contact with the fixed contact member 133 so that the horn device H is operated.

On the other hand, when the user releases his or her hand from the cover member 37 of the airbag module 30 and the pressing force applied to the airbag module 30 is released, the airbag module 30 is lifted up by the elastic force of the coil spring 110 . The movable contact member 131 provided at the base portion 34a of the housing 34 of the airbag module 30 is disengaged from the fixed contact member 133 and the operation of the horn device H is stopped.

FIG. 3 is a perspective view showing the construction of a coil spring according to an embodiment of the present invention, and FIG. 4 is a side view of the coil spring of FIG.

2 to 4, the upper end 111 of the coil spring 110 is fitted and fixed to the outer periphery of the pin member 36, and the lower end 113 of the coil spring 110 is fixed to the outer periphery of the steering wheel hub 11 And is in contact with the periphery of the through hole 11a.

The coil inner diameter D1 of the upper end 111 of the coil spring 110 is formed to be equal to or smaller than the outer diameter of the pin member 36 and can be fitted and fixed to the outer periphery of the proximal end portion of the pin member 36 .

The lower end portion 113 of the coil spring 110 is fixed to the steering wheel hub 13 side or the upper end portion 111 of the coil spring 110 is fixed to the base portion 34a of the housing 34, As shown in FIG. In this case, the base portion 34a of the housing 34 may be provided with a restraining member for restraining the upper end 111 of the coil spring 110. [

The coil spring 110 may be formed by spirally winding a single steel wire having a predetermined diameter, for example. The coil spring 110 may include a coiled portion 115 having a dense central portion. The support strength of the intermediate portion of the coil spring 110 is increased by the dense coil portion 115. Therefore, the coil spring 110 is vibrated by the external impact, so that the coil spring 110 is prevented from flowing radially about the pin member 36 or rapidly flowing in the longitudinal direction of the pin member 36, .

The external shock may be applied to the lower portion of the airbag module 30, that is, the housing (not shown), when the user pushes the airbag module 30 down sharply, for example, for a shock or a horn operation transmitted from the steering wheel skeleton 10, 34 may be caused by collision with the steering wheel skeleton 10, and the like.

The dense coil portion 115 has a coil pitch P3 that is smaller than the coil pitches P1 and P2 at both ends of the coil spring 110. [ The dense coil portion 115 may be configured such that the windings contact each other. That is, the coil pitch P3 may be substantially equal to the coil steel wire diameter d. With this configuration, it is possible to more effectively reduce the vibration of the coil spring 110 by increasing the supporting strength of the coil spring 110.

The upper portion of the dense coil portion 115 of the coil spring 110 may be wound in a cylindrical shape so as to have a shape corresponding to the outer periphery of the pin member 36 of the steering wheel skeleton 10. That is, the upper portion of the coil spring 110 may be wound so as to be tightly fixed to the outer circumference of the pin member 36 of the steering wheel skeleton body 10.

According to an embodiment of the present invention, the dense coil portion 115 of the coil spring 110 and the lower portion of the densely coiled portion 115 may have a conical shape. That is, the coil diameter Dm of the coil spring 110 may gradually increase as the coil diameter decreases toward the lower end. The coil average diameter (Dm) means the diameter of each winding relative to the center of the diameter of the steel wire.

According to one embodiment of the present invention, the coil spring 110 may have a substantially triangular flask shape.

When the steering wheel skeleton 10 vibrates when the vehicle is running, for example, the coil spring 110 configured as described above causes the coil spring (not shown) contacting the periphery of the through hole 11a of the steering wheel hub 11 110 may be brought into contact with the periphery of the through hole 11a of the steering wheel hub 11 so that an impact may be applied.

In this case, the coil spring 110 moves radially about the pin member 36 of the base portion 34a of the housing 34 to hit the pin member 36, and the coil spring 110 contracts sharply The airbag module 30 may strike the steering wheel skeleton 10 to generate noise.

At this time, the upper part of the densely coiled part 115 of the present invention is fitted and fixed to the outer circumference of the pin member 36 of the steering wheel skeleton 10, so that the vibration of the coil spring 110 is primarily captured during an external impact, Initially inhibit the occurrence.

The densified coil part 115 according to the present invention increases the supporting strength of the coil spring 110 to minimize the secondary vibration of the coil spring 110 so that the coil spring 110 bumps against the pin member 36 And the lower portion of the airbag module 30 is prevented from colliding with the steering wheel skeleton 10, thereby reducing noise generation.

The upper portion 115a of the dense coil portion 115 of the coil spring 110 is wound close to the pin member 36. [ With this configuration, when the coil spring 110 is impacted and the coil spring 110 is radially moved about the pin member 36, the upper portion 115a of the dense coil portion 115 contacts the pin member 36 , The impact force is small even if it collides with the outer periphery of the pin member 36, so that the noise intensity is also low.

Therefore, when the coil spring 115 is vibrated by the external impact, the coil spring 115 is quickly restrained by the upper portion 115a of the dense coil portion 115, so that it is possible to quickly prevent the noise from ringing.

In another embodiment, the coil spring 110 may be wound in various forms such as an hourglass shape having a constricted middle portion, a cylindrical shape having a uniform average coil diameter of the winding, or a conical shape in addition to the triangular flask shape as described above.

When the coil spring 110 has the hourglass shape or the cylindrical shape as described above, the coil average diameter of the upper and lower sides of the coil spring 110 is substantially larger than the diameter of the pin member 36, It can not be fitted and fixed to the outer periphery of the pin member 36. Therefore, when the coil spring 110 has an hourglass shape or a cylindrical shape, the upper end of the coil spring 110 can be coupled to the lower end of the base portion 34a of the housing 34. [ In another embodiment, the lower end of the coil spring 110 may be coupled to the steering wheel hub 11.

The coil spring 110 may be formed of a synthetic resin material having a rigidity capable of absorbing shocks and performing a spring function in addition to a metallic material.

FIG. 5 is a sectional view showing the configuration of a steering wheel of an automobile according to another embodiment of the present invention, and FIG. 6 is an enlarged view of a VI display portion of FIG.

Hereinafter, the same reference numerals are assigned to the same components as those of the above-described configuration, and redundant description is omitted.

5 and 6, the coil spring 110 includes a housing flange portion 34b extending outward from the upper end of the housing 34 constituting the airbag module 30, and a steering flange portion 34b Can be installed between the wheel spokes (13).

In this case, a pin member 36 protrudes downward from the housing flange portion 34b, and a through hole 13a through which the pin member 36 passes is formed in the steering wheel spoke 13.

The movable contact member 131 of the contact unit 130 is provided at the lower end of the flange portion 34a of the housing 34 and the fixed contact member 133 is fixed to the steering wheel spoke 13 by the movable contact member 131 As shown in FIG.

In another embodiment, the movable contact member may be provided so as to protrude from the lower surface of the housing flange portion 34b, and may be disposed on the upper surface of the steering wheel spoke 13 so as to face the movable contact member.

In addition to the method of improving the structure of the coil spring 110 as described above in order to prevent the vibration of the coil spring 110, a dustproof layer may be coated on the outer periphery of the pin member 36, An anti-vibration member or dustproof layer may be coated around the through hole through which the pin member 36 penetrates to absorb the impact of the coil spring 110 to prevent noise.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

1: steering wheel 10: steering wheel skeleton
11: Steering wheel hub 13: Steering wheel spoke
30: airbag module 34: housing
34a: Base 36: Pin member
100: horn switch device 110: coil spring
115: dense coil part P1, 2: winding pitch of the upper and lower coil springs
P3: winding pitch of dense coil part

Claims (5)

Airbag module;
Steering wheel skeleton;
A coil spring disposed between the airbag module and the steering wheel skeleton and movably supporting the airbag module along the central axis direction of the steering wheel skeleton;
A movable contact member provided in the airbag module; And
And a fixed contact member disposed on the steering wheel skeleton so as to correspond to the movable contact member,
Wherein the coil spring includes a densely coiled portion having a coil pitch at a center portion thereof and a coil pitch relatively smaller than a coil pitch at both ends of the coil spring. The steering wheel of a motor vehicle according to claim 1, wherein the windings of the dense coil part are in contact with each other. 3. The airbag module according to claim 2, wherein a pin member protrudes at a lower portion of the housing which houses the airbag of the airbag module in a folded state,
A through hole through which the pin member passes is formed in the steering wheel skeleton,
Wherein the coil spring is compressed between a lower surface of the housing and an upper surface around a through hole of the steering wheel skeleton after being fitted to the pin member. The steering wheel of a motor vehicle according to claim 3, wherein an upper portion of the densely coiled portion of the coil spring is wound around the outer periphery of the pin member. The steering wheel according to claim 4, wherein the densely coiled portion and the lower portion of the coil spring have a shape in which the average diameter of the coil increases as the steering wheel skeleton is turned.


KR1020160006148A 2016-01-18 2016-01-18 Steering wheel for vehicle KR101781388B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160006148A KR101781388B1 (en) 2016-01-18 2016-01-18 Steering wheel for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160006148A KR101781388B1 (en) 2016-01-18 2016-01-18 Steering wheel for vehicle

Publications (2)

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KR20170086375A true KR20170086375A (en) 2017-07-26
KR101781388B1 KR101781388B1 (en) 2017-10-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230110089A (en) * 2022-01-14 2023-07-21 아우토리브 디벨롭먼트 아베 Airbag housing for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230110089A (en) * 2022-01-14 2023-07-21 아우토리브 디벨롭먼트 아베 Airbag housing for vehicle

Also Published As

Publication number Publication date
KR101781388B1 (en) 2017-10-23

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