JP2015145173A - steering wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering wheel capable of expanding a band of a vibration frequency which can be adjusted, and improving a vibration isolating effect.SOLUTION: A steering wheel 1 has a core metal 2 for forming a frame of the steering wheel 1, an airbag module 3 disposed at a center part of the steering wheel 1, and a damper 4 disposed between the core metal 2 and the airbag module 3, fixed to the core metal 2, and supporting the airbag module 3 slidably to the core metal 2. The damper 4 can be disposed under the airbag module 3 within a limited space of the steering wheel 1. The height position of a gravity center of the airbag module 3 and the installation height of the damper 4 can be separated maximally. A band of an adjustable vibration frequency can be expanded, and a vibration isolating effect of the damper 4 can be improved.

Description

  The present invention relates to a steering wheel for operating a steering angle of a vehicle such as an automobile, and more particularly to a steering wheel provided with a vibration damping mechanism.

  A steering wheel that controls the steering angle of a vehicle such as an automobile generally has a core metal that forms a skeleton of the steering wheel, and an airbag module that is disposed at the center of the steering wheel (for example, a patent). Reference 1 and Patent Document 2). Further, the steering wheel described in Patent Document 1 and Patent Document 2 has a pair of horn plates connected to a core metal and an airbag module, and a dynamic damper as a vibration damping mechanism is disposed between the horn plates. ing.

  The dynamic damper is connected to one horn plate via an elastic body, and is configured to support the other horn plate so as to be movable in the vertical direction. With this configuration, the vibration frequency of the airbag module that is a mass body can be adjusted, and vibration transmitted from the vehicle body side to the steering wheel can be canceled by the resonance of the airbag module to be damped.

Japanese Patent No. 5005019 Japanese Patent No. 5153526

  In the steering wheel described in Patent Document 1 and Patent Document 2 described above, since the damper must be disposed in a limited space of the steering wheel, the damper is disposed at a position adjacent to the airbag module. Therefore, there is a problem that the height position of the center of gravity of the airbag module and the installation height of the damper are close to each other, the band of the adjustable vibration frequency is narrow, and the damping effect is easily limited.

  The present invention has been devised in view of such problems, and an object of the present invention is to provide a steering wheel capable of extending the adjustable vibration frequency band and improving the vibration damping effect.

  According to the present invention, in a steering wheel for manipulating a steering angle of a vehicle, a cored bar that forms a skeleton of the steering wheel, an airbag module disposed in a central portion of the steering wheel, the cored bar, and the air A steering wheel is provided that includes a damper that is disposed between the bag module and is fixed to the core metal and that supports the airbag module so as to vibrate with respect to the core metal.

  The core metal may have an opening for locking the damper, and may have a protrusion around the opening for adjusting the vibration frequency of the airbag module. Further, the protrusion may be formed on the inner peripheral surface of the opening, may be formed on the edge surface, may be formed on the rear surface of the edge, You may form in the some surface which combined the edge part surface and the edge back surface arbitrarily. The protrusion may be formed in a dot shape or a linear shape.

  The damper includes an annular elastic body fixed to the core metal, a cylindrical bush inserted into the opening of the elastic body, and a support member inserted into the elastic body and the bush from the core metal side. And a connecting member connected to the support member from the airbag module side, and a spring inserted into the connecting member so as to contact the bush.

  The support member includes an insertion portion through which the connection member can be inserted, and a bending spring biased so as to be able to lock the connection member inserted through the insertion portion, and the connection member includes: You may have the axial part which can be inserted in the said insertion part, and the hook which is formed in the front-end | tip of this axial part, and can be latched by the said bending spring.

  The elastic body may be made of rubber or foamed resin. The connecting member may be inserted through a retainer that constitutes the airbag module, or may be inserted through a horn plate that constitutes the airbag module. The support member may have a stopper capable of adjusting the biasing force of the spring.

  The steering wheel includes a movable contact disposed on a lower surface of a retainer or a horn plate constituting the airbag module, and a fixed contact disposed on an upper surface of the core metal, and presses the airbag module. The movable contact and the fixed contact may come into contact with each other to move a horn when moved toward the core bar.

  According to the above-described steering wheel according to the present invention, by fixing the damper to the metal core, the damper can be disposed below the airbag module in a limited space of the steering wheel, and the center of gravity of the airbag module is achieved. The height position of the damper and the installation height of the damper can be separated as much as possible, and the adjustable vibration frequency band can be expanded. Therefore, the damping effect of the damper can be improved.

  Moreover, the vibration frequency of the airbag module can be easily adjusted by forming a protrusion at the opening of the metal core that locks the damper.

It is sectional drawing which shows the steering wheel which concerns on 1st embodiment of this invention. It is the elements on larger scale which show the protrusion formed in the metal core of the X section shown in Drawing 1, (A) shows the 1st example, (B) shows the 2nd example, and (C) shows the 3rd example. Yes. It is sectional drawing which shows the position which forms protrusion, (A) is a 1st example, (B) is a 2nd example, (C) is a 3rd example, (D) is a 4th example, (E) is a 5th. An example is shown. FIG. 2 is a component development view of the damper shown in FIG. 1. It is sectional drawing which shows the assembly | attachment state of a damper, (A) has what has a rubber-made elastic body, (B) has shown what has a foamed-resin-made elastic body. It is a figure which shows the 1st modification of a damper, (A) is a components expanded view, (B) is sectional drawing which shows an assembly | attachment state. It is a figure which shows the 2nd modification of a damper, (A) is a components expanded view, (B) is sectional drawing which shows an assembly | attachment state. It is sectional drawing which shows the steering wheel which concerns on 2nd embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is a sectional view showing the steering wheel according to the first embodiment of the present invention. 2A and 2B are partial enlarged views showing protrusions formed on the cored bar of the portion X shown in FIG. 1, wherein FIG. 2A is a first example, FIG. 2B is a second example, and FIG. 2C is a third example. , Shows.

  As shown in FIG. 1, the steering wheel 1 according to the first embodiment of the present invention is a steering wheel for manipulating a steering angle of a vehicle, and includes a cored bar 2 that forms a skeleton of the steering wheel 1, a steering wheel 1 is arranged between the air bag module 3 disposed at the center of the air bag 1, the core metal 2 and the air bag module 3, and is fixed to the metal core 2 so that the air bag module 3 can vibrate with respect to the metal core 2. And a damper 4 to be supported.

  The airbag module 3 includes, for example, an airbag 31 that is inflated and deployed in an emergency, an inflator 32 that supplies gas to the airbag 31, a retainer 33 that supports the airbag 31 and the inflator 32, an airbag 31, and an inflator 32. And a module cover 34 that covers the retainer 33. About the airbag 31, the inflator 32, and the module cover 34, the well-known structure used conventionally can be applied arbitrarily and is not limited to the shape shown in figure.

  The retainer 33 has a protrusion 33a that forms a space for installing the damper 4 (specifically, the connecting member 44) on the bottom surface. An opening 33b for locking the damper 4 (connecting member 44) is formed at the tip of the protrusion 33a. At least one, preferably two or more, more preferably three or more protrusions 33 a are formed on the outer periphery of the inflator 32. In particular, by forming the protrusions 33a at three locations corresponding to the apexes of the triangle and installing the damper 4, the airbag module 3 can be supported in a balanced manner with a minimum necessary number in a balanced manner.

  The core metal 2 is a die-cast product such as magnesium or aluminum, and is a component that forms the skeleton of the steering wheel 1. Specifically, it has an annular rim portion 21 that forms a handle portion, a hub core portion 22 that is connected to the steering shaft, and a spoke portion 23 that connects the rim portion 21 and the hub core portion 22. The outer periphery of the core metal 2 is molded with resin as necessary, and is formed into a desired shape of the steering wheel 1.

  Further, as shown in FIGS. 2A to 2C, the cored bar 2 has an opening 24 for locking the damper 4, and the vibration frequency of the airbag module 3 is adjusted around the opening 24. It has a plurality of projections 25 to do. In the first example of the protrusion 25 shown in FIG. 2A, the protrusion 25 is formed in a dot shape. Specifically, the protrusion 25 has a hemispherical shape. In the second example of the protrusion 25 shown in FIG. 2B, the protrusion 25 is formed in a linear shape. Specifically, the protrusion 25 has a semi-cylindrical shape. In the third example of the protrusion 25 shown in FIG. 2C, the protrusion 25 is formed in a linear shape. Specifically, the protrusion 25 has a triangular prism shape. In addition, the shape of the illustrated protrusion 25 is merely an example, and is not limited to these shapes.

  Here, FIG. 3 is a cross-sectional view showing positions where the dot-like protrusions 25 shown in FIG. 2A are formed, where FIG. 3A is a first example, FIG. 3B is a second example, and FIG. Indicates a third example, (D) indicates a fourth example, and (E) indicates a fifth example. For example, as illustrated in FIG. 3A, the protrusion 25 is disposed on the inner peripheral surface 24 a, the edge surface 24 b, and the edge back surface 24 c of the opening 24. The protrusion 25 is disposed within a range in contact with a part of the damper 4 (elastic body 41). The height h and width w (and the length in the case of a line) of the protrusion 25 can be arbitrarily set according to the shape, model, and the like of the steering wheel 1.

  Further, as shown in FIG. 2A, the protrusions 25 are arranged at equal intervals, for example, at four positions on the inner peripheral surface 24a, the edge surface 24b, and the edge back surface 24c. It is not limited. For example, as shown in FIG. 3B, the protrusion 25 may be disposed only on the inner peripheral surface 24a of the opening 24, or the edge of the opening 24 as shown in FIG. The protrusion 25 may be disposed only on the front surface 24b, or the protrusion 25 may be disposed only on the edge rear surface 24c of the opening 24 (not shown).

  Further, as shown in FIG. 3D, the protrusions 25 may be disposed on the edge surface 24b and the edge back surface 24c of the opening 24, and as shown in FIG. The protrusions 25 may be disposed on the inner peripheral surface 24a and the edge surface 24b of 24, or the protrusions 25 may be disposed on the inner peripheral surface 24a and the edge rear surface 24c of the opening 24 (not shown).

  Thus, the protrusion 25 may be formed only on the inner peripheral surface 24a of the opening 24, may be formed only on the edge surface 24b, or may be formed only on the edge rear surface 24c. Alternatively, the inner peripheral surface 24a, the edge surface 24b, and the edge back surface 24c may be formed on a plurality of surfaces arbitrarily combined. In addition, the number of protrusions 25 and the arrangement interval can be arbitrarily set.

  As shown in FIGS. 2B and 2C, when the protrusions 25 are formed in a linear shape, for example, they are preferably arranged radially with respect to the opening 24. At this time, as shown in the drawing, the protrusion 25 may extend from the edge surface 24b to the edge back surface 24c via the inner peripheral surface 24a. Of course, the protrusions 25 may be dispersed and arranged in a dotted line on each of the inner peripheral surface 24a, the edge surface 24b, and the edge back surface 24c. Although not shown, the protrusion 25 may be disposed so as to extend along the circumferential direction of the opening 24.

  Also in the case of such a linear protrusion 25, the protrusion 25 may be formed only on the inner peripheral surface 24a of the opening 24, may be formed only on the edge surface 24b, or the edge rear surface 24c. May be formed only on the inner surface 24a, or may be formed on a plurality of surfaces arbitrarily combining the inner peripheral surface 24a, the edge surface 24b, and the edge rear surface 24c. In addition, the number of protrusions 25 and the arrangement interval can be arbitrarily set.

  By forming the protrusion 25 described above on the metal core 2 (hub core portion 22), the contact area and contact distribution with the damper 4 (especially the elastic body 41) can be arbitrarily adjusted, and the vibration frequency of the airbag module 3 can be adjusted. Can be adjusted more easily. Moreover, since the metal core 2 is a die-cast product, there is an advantage that the protrusions 25 can be easily formed.

  Next, the configuration of the damper 4 will be described. Here, FIG. 4 is a component development view of the damper shown in FIG. FIG. 5 is a cross-sectional view showing the assembled state of the damper, where (A) shows a rubber elastic body, and (B) shows a foamed resin elastic body. In each figure, for convenience of explanation, only a part of the core metal 2 and the retainer 33 is shown, and the illustration of the protrusion 25 is omitted.

  The damper 4 shown in FIG. 4 includes an annular elastic body 41 fixed to the core metal 2, a cylindrical bush 42 inserted into the opening 41 a of the elastic body 41, the elastic body 41 and the core metal 2 from the side. A support member 43 inserted into the bush 42; a connection member 44 connected to the support member 43 from the airbag module 3 side; and a spring 45 inserted into the connection member 44 so as to contact the bush 42. ing. In addition, the structure of the damper 4 shown in figure is a mere example, and is not limited to this structure, The well-known structure used conventionally can be applied.

  For example, as shown in FIGS. 4 and 5A, the elastic body 41 has an opening 41 a and a cylindrical body that is inserted into the opening 24 of the core metal 2, and an edge of the opening 24. A pair of flange portions in contact with the part surface 24b and the edge back surface 24c. The elastic body 41 is made of, for example, rubber (specifically, synthetic rubber such as ethylene / propylene / diene rubber (EPDM)). Although not shown, in order to suppress wear of the elastic body 41, a protector ring that covers the outer periphery of the elastic body 41 and is locked to the opening 24 may be disposed.

  The bush 42 includes, for example, a first bush 421 inserted into the opening 41a of the elastic body 41 from the edge surface 24b side of the core metal 2 and an opening 41a of the elastic body 41 from the edge rear surface 24c side of the core metal 2. And a second bushing 422 that engages with the first bushing 421. The bush 42 may be formed by a divided body (a first bush 421 and a second bush 422) as illustrated from the viewpoint of manufacturing, or the first bush 421 and the second bush 422 may be integrally formed. It may be. The bush 42 may be made of metal or resin.

  The first bush 421 includes a ring-shaped and flat plate-shaped main body 421a, a plurality of columnar portions 421b having a circular arc cross section formed so as to be able to be inserted from the main body 421a into the opening 41a of the elastic body 41, and a connection member 44 side formation. And a cylindrical portion 421c for accommodating the end portion of the spring 45. The second bush 422 has an annular and flat plate-like main body 422a, and a columnar portion 422b that is formed so as to be able to be inserted from the main body 422a into the opening 41a of the elastic body 41 and is inserted into a gap between the columnar portions 421b. ing. A hook that can be engaged with the main body portion 421a of the first bush 421 is formed at the tip of the columnar portion 422b.

  Then, the columnar part 421b of the first bushing 421 and the columnar part 422b of the second bushing 422 are inserted into the opening 41a of the elastic body 41 in combination with each other, and the hook of the columnar part 422b is engaged with the first bushing 421. Thereby, the cylinder part which can insert the support member 43 and the connection member 44 can be formed.

  Further, when the first bush 421 and the second bush 422 are assembled, the first bush 421 is brought into contact with the surface of the main body 422 a of the second bush 422 by bringing the tip of the columnar portion 421 b of the first bush 421 into contact with the front surface. The distance between the main body portion 421a and the main body portion 422a of the second bush 422 can be kept substantially constant, and deformation (compression) of the elastic body 41 can be suppressed.

  The support member 43 includes, for example, a flange-shaped main body 43a that is larger than the opening 24 of the core metal 2, and an insertion portion 43b that is inserted from the main body 43a into the opening 24 of the core metal 2 and through which the connecting member 44 can be inserted. The bending member 43c has a bending spring 43c biased so as to be able to lock the connecting member 44 inserted through the insertion portion 43b, and a holding portion 43d that holds the bending spring 43c.

  As shown in FIG. 5A, the insertion portion 43b extends to a position penetrating the bush 42 during assembly, thereby stabilizing the contact between the outer peripheral surface of the insertion portion 43b and the inner peripheral surface of the bush 42. be able to. For example, as shown in FIG. 4, the bending spring 43 c has a U shape or a V shape, and is biased in a direction in which both ends approach the inside. The holding portion 43d is a protrusion disposed on the surface of the main body portion 43a, is disposed inside the bending spring 43c, and is formed so that both ends of the bending spring 43c can move in the opening direction. Further, a part of the bending spring 43 c is disposed so as to be spanned over the opening of the support member 43.

  On the other hand, the connecting member 44 includes a shaft portion 44a that can be inserted into the insertion portion 43b of the support member 43, a hook 44b that is formed at the tip of the shaft portion 44a and can be locked to the bending spring 43c, and a retainer 33 (projection portion 33a). And a flange portion 44c formed larger than the opening portion 33b formed in the above. The hook 44b has, for example, a conical shape with a sharp tip, and has a recess capable of locking the bending spring 43c on the bottom surface side.

  A spring 45 inserted through the shaft portion 44 a of the connecting member 44 is disposed between the bush 42 and the retainer 33. Although not shown, the bush 42 (first bush 421) may have a protrusion capable of locking the spring 45.

  According to the damper 4 having such a configuration, after the elastic body 41 is engaged with the opening 24 of the core metal 2, the first bush 421 and the second bush 422 are inserted into the opening 41 a of the elastic body 41. 42 can be assembled. Then, the insertion portion 43b of the support member 43 is inserted into the cylindrical portion of the bush 42 from the core metal 2 side, the spring 45 is disposed on the cylindrical portion 421c of the bush 42, and the connecting member from the retainer 33 (airbag module 3) side. The damper 4 can be assembled to the steering wheel 1 by inserting the shaft 44 into the opening portion 33b and passing it through the insertion portion 43b of the support member 43 and engaging the hook 44b with the bending spring 43c.

  As described above, since the damper 4 has a snap-in structure for locking the bending spring 43c and the hook 44b, the damper 4 can be easily attached to the support member 43 only by inserting the connecting member 44 into the support member 43. The connecting member 44 can be connected. Such a snap-in structure is merely an example, and is not limited to the illustrated configuration.

  Further, the elastic body 41 may be formed of a foamed resin such as polyurethane as shown in FIG. In this case, when the resin material is molded on the outer periphery of the cored bar 2, the foamed resin is integrally molded at the edge of the opening 24 of the cored bar 2 at the same time. By forming the elastic body 41 from foamed resin, it is possible to reduce the number of parts and assembly man-hours, thereby reducing the cost. The damper 4 shown in FIG. 5B has the same configuration as that shown in FIG. 5A except for the elastic body 41, and thus detailed description thereof is omitted.

  According to the steering wheel 1 according to the first embodiment described above, the damper 4 is fixed to the core metal 2 so that the damper 4 is placed below the airbag module 3 in the limited space of the steering wheel 1. The position of the center of gravity of the airbag module 3 and the installation height of the damper 4 can be separated as much as possible, and the adjustable vibration frequency band can be expanded. The vibration control effect can be improved. Moreover, the vibration frequency of the airbag module 3 can be easily adjusted by forming the protrusion 25 in the opening 24 of the core metal 2 that locks the damper 4.

  Further, by using the damper 4 described above, the airbag module 3 can be supported so as to be capable of vibrating with respect to the core metal 2 and movable in the axial direction of the support member 43 or the connecting member 44, and functions as a dynamic damper. In addition, it can function as the horn switch 5.

  The horn switch 5 includes, for example, as shown in FIG. 1, a movable contact 5 a disposed on the lower surface of the retainer 33 constituting the airbag module 3 and a fixed contact 2 b disposed on the upper surface of the core metal 2. And the movable contact 5a and the fixed contact 5b come into contact with each other to ring the horn when the airbag module 3 is pressed and moved toward the cored bar 2. The movable contact 5a and the fixed contact 5b may be arranged at the tip of the columnar member so as to be able to come into contact with the damper 4 in accordance with the amount of movement of the airbag module 3 in the axial direction. The movable contact 5a and the fixed contact 5b are formed of a metal material having excellent conductivity such as copper.

  Next, a modified example of the damper 4 will be described. Here, FIG. 6 is a figure which shows the 1st modification of a damper, (A) is a component expanded view, (B) is sectional drawing which shows an assembly | attachment state. 7A and 7B are diagrams showing a second modification of the damper, in which FIG. 7A is a development view of parts and FIG. 7B is a sectional view showing an assembled state. In addition, about the same component as the damper 4 mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the first modification of the damper 4 shown in FIGS. 6A and 6B, the second bush 422 and the support member 43 are integrally formed. Like the support member 43, the support member 43 in the first modification has a main body 43a, a bending spring 43c, and a holding portion 43d, and is inserted from the main body 43a into the opening 41a of the elastic body 41. It has a columnar portion 43e that is formed so as to be inserted into a gap between the columnar portions 421b of the first bush 421. A hook that can be engaged with the main body 421a of the first bush 421 is formed at the tip of the columnar portion 43e.

  According to such a configuration, the support member 43 can also serve as the second bush 422 described above, so that the number of parts and assembly man-hours can be reduced, and the cost can be reduced. In the first modified example, since the support member 43 is fixed to the cored bar 2, the hook 44b that locks the bending spring 43c of the connecting member 44 has a length that allows the connecting member 44 to move in the axial direction. A dimple 44d having is formed.

  In the second modified example of the damper 4 shown in FIGS. 7A and 7B, the support member 43 has a stopper 46 that can adjust the urging force of the spring 45. Specifically, a threaded portion 43f is formed at the tip of the insertion portion 43b of the support member 43, and a nut constituting the stopper 46 is screwed to the threaded portion 43f. The threaded portion 43f is formed on an extension line of the insertion portion 43b. For example, as shown in FIG. 7B, the threaded portion 43f is formed such that the tip of the threaded portion 43f abuts the surface of the retainer 33. Is done.

  The stopper 46 (nut) has a larger width than the spring 45 and sandwiches the spring 45 between the bush 42 and the stopper 46 (nut). The axial position of the stopper 46 (nut) can be arbitrarily changed by rotating the stopper 46 (nut) in an arbitrary direction in a state where the stopper 46 (nut) is screwed to the threaded portion 43f. Can be adjusted arbitrarily. The vibration frequency of the airbag module 3 can also be adjusted by adjusting the biasing force of the spring 45.

  Next, the steering wheel 1 which concerns on 2nd embodiment of this invention is demonstrated. Here, FIG. 8 is a sectional view showing a steering wheel according to the second embodiment of the present invention. In addition, about the same component as 1st embodiment shown in FIG. 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  The steering wheel 1 according to the first embodiment shown in FIG. 1 has a connecting member 44 inserted through a retainer 33 (protruding portion 33a) constituting the airbag module 3, whereas FIG. In the steering wheel 1 according to the second embodiment shown, the connecting member 44 is inserted through the horn plate 35 constituting the airbag module 3.

  The airbag module 3 in this embodiment includes a horn plate 35 in addition to the airbag 31, the inflator 32, the retainer 33, and the module cover 34. The retainer 33 has a leg portion 33 c inserted through the opening of the horn plate 35 and a stopper 33 d for positioning the horn plate 35.

  The horn plate 35 has an opening through which the leg 33c is inserted, and a bending spring 35a constituting a snap-in structure is disposed in the opening. When the leg portion 33c is inserted into the opening of the horn plate 35 and is locked to the bending spring 35a, the stopper 33d comes into contact with the surface of the horn plate 35, and the horn plate 35 is formed by the leg portion 33c and the stopper 33d. It is clamped and integrated with the airbag module 3. The movable contact 5a is disposed on the lower surface of the horn plate 35.

  The damper 4 in the second embodiment has a bolt / nut structure, not a snap-in structure. Specifically, in the damper 4 in the second embodiment, the support member 43 is constituted by a shoulder nut, and the connecting member 44 is constituted by a bolt. A connecting member 44 (bolt) is inserted from the horn plate 35 side constituting the airbag module 3 and is screwed to the support member 43 (shoulder nut).

  According to such a configuration, the biasing force of the spring 45 can be arbitrarily adjusted by adjusting the tightening degree of the connecting member 44 (bolt) with respect to the support member 43 (shoulder nut). In addition, about the elastic body 41 and bush 42 which comprise the damper 4, the thing of the same structure as what was shown in 1st embodiment mentioned above can be selected suitably, and can be applied.

  The cored bar 2 has a rim part 21, a hub core part 22, and a spoke part 23, as in the first embodiment, and further avoids interference with the airbag module 3 (leg part 33c). The opening 26 may be provided. Although not shown, the cored bar 2 may have a protrusion 25 for adjusting the vibration frequency of the airbag module 3 around the opening 24.

  According to the steering wheel 1 according to the second embodiment described above, the damper module is fixed to the core metal 2 in the same manner as in the first embodiment described above, so that the air bag module is limited within the limited space of the steering wheel 1. The damper 4 can be arranged below the position 3, the height position of the center of gravity of the airbag module 3 and the installation height of the damper 4 can be separated as much as possible, and the adjustable vibration frequency band is expanded. Therefore, the damping effect of the damper 4 can be improved.

  In addition, according to the second embodiment described above, the horn plate 35 constituting a part of the horn switch 5 can be integrated with the airbag module 3 to be modularized, and the airbag module 3 can be handled. Can be easily.

  The present invention is not limited to the above-described embodiment. For example, the damper 4 shown in the second embodiment can be applied to the steering wheel 1 according to the second embodiment. Of course, various modifications can be made without departing from the spirit of the present invention, such as being applicable to the steering wheel 1 according to the first embodiment.

DESCRIPTION OF SYMBOLS 1 Steering wheel 2 Core metal 3 Airbag module 4 Damper 5 Horn switch 5a Movable contact 5b Fixed contact 21 Rim part 22 Hub core part 23 Spoke part 24 Opening part 24a Inner peripheral surface 24b Edge part surface 24c Edge back face 25 Protrusion 26 Opening part 31 Airbag 32 Inflator 33 Retainer 33a Protruding portion 33b Opening portion 33c Leg portion 33d Stopper 34 Module cover 35 Horn plate 35a Bending spring 41 Elastic body 41a Opening portion 42 Bushing 43 Support member 43a Body portion 43b Inserting portion 43c Bending spring 43d Holding portion 43e Columnar portion 43f Threaded portion 44 Connecting member 44a Shaft portion 44b Hook 44c Flange portion 45 Spring 46 Stopper 421 First bushing 421a Main body portion 421b Columnar portion 421c Tubular portion 422 Second bushing 422a Part 422b columnar section

Claims (10)

In a steering wheel that controls the steering angle of a vehicle,
A cored bar forming a skeleton of the steering wheel;
An airbag module disposed in a central portion of the steering wheel;
A damper disposed between the cored bar and the airbag module and fixed to the cored bar so as to vibrate the airbag module relative to the cored bar;
A steering wheel characterized by comprising:   The said core metal has an opening part which latches the said damper, and has a protrusion for adjusting the vibration frequency of the said airbag module around this opening part. Steering wheel.   The steering wheel according to claim 2, wherein the protrusion is formed on an inner peripheral surface, an edge surface, an edge back surface, or a plurality of surfaces obtained by combining these.   The steering wheel according to claim 2, wherein the protrusion is formed in a dot shape or a line shape.   The damper includes an annular elastic body fixed to the core metal, a cylindrical bush inserted into the opening of the elastic body, and a support member inserted into the elastic body and the bush from the core metal side. The steering according to claim 1, further comprising: a connection member connected to the support member from the airbag module side; and a spring inserted into the connection member so as to contact the bush. wheel.   The support member includes an insertion portion through which the connection member can be inserted, and a bending spring biased so as to be able to lock the connection member inserted through the insertion portion, and the connection member includes the insertion member. The steering wheel according to claim 5, further comprising: a shaft portion that can be inserted into the portion, and a hook that is formed at a tip of the shaft portion and can be locked to the bending spring.   The steering wheel according to claim 5, wherein the elastic body is made of rubber or foamed resin.   The steering wheel according to claim 5, wherein the connecting member is inserted into a retainer or a horn plate that constitutes the airbag module.   The steering wheel according to claim 5, wherein the support member has a stopper capable of adjusting a biasing force of the spring. A movable contact disposed on a lower surface of a retainer or horn plate constituting the airbag module, and a fixed contact disposed on an upper surface of the core metal, and pressing the airbag module toward the core metal. 2. The steering wheel according to claim 1, further comprising a horn switch configured so that the movable contact and the fixed contact come into contact with each other to sound a horn when moved.