WO2021152907A1

WO2021152907A1 - Vibration generating device

Info

Publication number: WO2021152907A1
Application number: PCT/JP2020/036119
Authority: WO
Inventors: 賢司河野
Original assignee: クラリオン株式会社
Priority date: 2020-01-31
Filing date: 2020-09-24
Publication date: 2021-08-05
Also published as: JP2021122754A; JP7465665B2

Abstract

To provide a vibration generating device that can produce sound with low frequencies emphasized.　This vibration generation device 1 is provided with a vibration generation unit that generates vibrations and a vehicle-side fixed section 30 that is fixed to a header panel 56 of a vehicle 50, and vibrations from the vibration generation unit are conveyed to a windshield of the vehicle 50 via the header panel 56.

Description

Vibration generator

The present invention relates to a vibration generator.

Patent Document 1 is a technique for generating sound by vibrating the front window glass of a vehicle. In Patent Document 1, "a piezoelectric vibrator is installed on the front glass of an automobile (for example, a freight vehicle, particularly a cab-over type freight vehicle), and an electric signal supply device for applying an electric signal to the piezoelectric vibrator is provided. The electric signal supply device has a function of applying an electric signal to the piezoelectric vibrator when an alarm signal for the driver is output from the alarm system (alarm system for the driver, various known alarm systems). " Is described.

Japanese Unexamined Patent Publication No. 2011-20651

However, it is difficult to emphasize the low-pitched sound in the configuration in which the front window glass is directly vibrated to generate sound as in Cited Document 1.

An object of the present invention is to provide a vibration generator capable of generating a sound with emphasized bass.

This specification includes all the contents of the Japanese patent application and Japanese Patent Application No. 2020-015442 filed on January 31, 2020.
One aspect of the present invention includes a vibration generating portion that generates vibration and a vehicle-side fixing portion that is fixed to the header panel of the vehicle, and the vibration of the vibration generating portion is transmitted to the window glass of the vehicle through the header panel. It is a vibration generator characterized by being transmitted.

According to the present invention, it is possible to emit a sound that emphasizes the bass range.

FIG. 1 is a side view of a vehicle to which the vibration generator according to the embodiment of the present invention is attached. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a diagram schematically showing the configuration of the vibration generator together with the internal configuration of the front side of the space behind the ceiling interior material. FIG. 4 is a perspective view showing the configuration of the vibration generator. FIG. 5 is a perspective view showing the configuration of the exciter. FIG. 6 is a cross-sectional view of the exciter. FIG. 7 is a diagram showing a mounting mode of the extending portion to the fixed portion on the vehicle side. FIG. 8 is a diagram showing an aspect of the vehicle-side fixing portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a vehicle 50 to which the vibration generator 1 according to the present embodiment is attached, and FIG. 2 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 2, the vibration generator 1 receives an audio electric signal from a sound source device 59 provided in the vehicle 50 and oscillates based on the sound source device 59 to form an opening 53 in the vehicle 50. It is a device that vibrates the window glass covering the vehicle 50 as a diaphragm and emits a sound in the vehicle interior of the vehicle 50. The vibration generator 1 and the window glass of the vehicle 50 constitute an in-vehicle sound system that emits sound in the vehicle interior. Although FIG. 2 shows a configuration in which the sound source device 59 is arranged in the space S behind the ceiling interior material, which will be described later, the sound source device 59 can be arranged at an arbitrary position.

As shown in FIG. 1, the vehicle 50 includes a windshield 51F, a rear glass 51R, and a door glass 51D provided on the door 52 as window glass. Any of the windshields 51F, rear glass 51R, and door glass 51D can be used as a diaphragm to be vibrated by the vibration generator 1. In this embodiment, a case where the vibration generator 1 vibrates the windshield 51F is illustrated.

As shown in FIG. 2, the vibration generator 1 is a space between the roof panel 54 constituting the roof of the vehicle 50 and the ceiling interior material 55 constituting the ceiling in the vehicle interior (hereinafter referred to as a space behind the ceiling interior material). ) Installed in S. Further, the vibration generator 1 is arranged at substantially the center O of the vehicle width Vw of the vehicle 50 in the space S behind the ceiling interior material. By arranging the vibration generator 1 substantially in the center O, the vibration of the windshield 51F is supported on both the left and right sides of the pillar 57 (so-called A pillar: FIG. 1) as compared with the case where the vibration generator 1 is installed so as to be biased to either the left or right side. It becomes less susceptible to the influence, and the vibration of the windshield 51F makes the bass range efficiently reverberate in the vehicle interior.

FIG. 3 is a diagram schematically showing the configuration of the vibration generator 1 together with the internal configuration on the front side of the space S on the back side of the ceiling interior material.
As shown in the figure, in the space S on the back side of the ceiling interior material, the upper end portion 51FA of the windshield 51F is joined to the tip portion 54A of the roof panel 54 by an adhesive or the like. Further, a plurality of roof reinforcing members called reinforcements are appropriately attached to the roof panel 54 in the front-rear direction of the vehicle 50. The strength of the roof panel 54 is reinforced by these roof reinforcing members. Among these roof reinforcing members, those that reinforce the window glass opening 53 in the roof panel 54 are generally referred to as header panels 56. The header panel 56 is provided in each of the opening 53 of the windshield 51F and the opening 53 (FIG. 1) of the rear glass 51R, and the header panel 56 on the side of the windshield 51F is also referred to as a front header panel. The header panel 56 on the side of the rear glass 51R is also referred to as a rear header panel.

The header panel 56 has a substantially L-shaped cross section having a first surface 56A extending in the front-rear direction B of the vehicle 50 and a second surface 56B extending in the height direction H of the vehicle 50, and the vehicle 50. It is a long plate made of metal extending in the vehicle width direction E (FIG. 2). Both ends of the header panel 56 in the vehicle width direction E are fixed to the pillars 57 on both the left and right sides by welding or the like. Further, in the header panel 56, the end portion 56AT of the first surface 56A is fixed to the opening 53 of the windshield 51F, and the end portion 56BT of the second surface 56B is located on the rear side of the vehicle 50 with respect to the opening 53. It is fixed to the panel 54. The roof panel 54 and the header panel 56 form a frame 65 for fixing the upper end portion of the windshield (in FIG. 5, the upper end portion 51FA of the windshield 51F).

The configuration of the header panel 56 will be described in more detail.
The header panel 56 is provided with a first mounting portion 56C1 at the end portion 56AT of the first surface 56A, and the first mounting portion 56C1 is oriented in the vehicle width direction E along the upper edge 54U of the opening 53 of the roof panel 54. It extends and is fixed by welding or the like in a state where it overlaps with the upper edge 54U.
Further, the header panel 56 is provided with a second mounting portion 56C2 extending in the vehicle width direction E at the end portion 56BT of the second surface 56B, and the second mounting portion 56C2 extends in the vehicle width direction E to extend the surface of the roof panel 54. It is fixed with an adhesive or the like. The same applies to the configuration of the header panel 56 on the rear side.

The vibration generator 1 is fixed to the header panel 56 (front header panel in this embodiment) among these roof reinforcing members. Then, when the vibration generator 1 vibrates, it is transmitted to the upper end portion 51FA of the windshield (windshield 51F in this embodiment) through the header panel 56 over the vehicle width direction E, and the windglass vibrates into the vehicle interior. Sound will be generated.

In general, the window glass has a larger area than the header panel 56, is heavier than the members of the vehicle body frame such as the header panel 56, and is firmly fixed to the opening 53. Therefore, when the vibrating body is directly provided on the window glass as in the conventional configuration described in Patent Document 1, the window glass is difficult to vibrate and is inefficient.
On the other hand, by configuring the vibration generator 1 to vibrate the window glass through the header panel 56 as in the present embodiment, the window glass can be vibrated more efficiently than in the conventional configuration, and the bass range can be reduced. The emphasized sound can be emitted inside the vehicle interior. Such an effect has been confirmed by a comparative experiment between the conventional configuration and the configuration of the present embodiment. Then, by providing the vibration generator 1 of the present embodiment in the vehicle 50, a more powerful sound can be reverberated in the vehicle interior.

Next, the configuration of the vibration generator 1 of the present embodiment will be described in detail.
FIG. 4 is a perspective view showing the configuration of the vibration generator 1.
As shown in FIGS. 3 and 4, the vibration generator 1 generates an exciter 2 and an exciter 2 which are vibration generating members that generate vibration based on an audio electric signal input from the sound source device 59 (FIG. 2). A vibration transmission member 4 for transmitting the vibration to be generated to the header panel 56 is provided.

FIG. 5 is a perspective view showing the configuration of the exciter 2, and FIG. 6 is a cross-sectional view of the exciter 2.
As shown in FIGS. 5 and 6, the exciter 2 includes a tubular frame 6 having a central axis C, a magnetic circuit 8, a damper 10 for suspending the magnetic circuit 8 on the frame 6, and the inside of the frame 6. When a voice electric signal is input to the voice coil 9, a Lorentz force acts between the voice coil 9 and the magnetic circuit 8, and the magnetic circuit is suspended by the damper 10. 8 is configured to vibrate.

The frame 6 is formed in a cylindrical shape from a resin material that is advantageous for weight reduction or a metal material that is advantageous for heat dissipation.
As shown in FIG. 6, the magnetic circuit 8 has a yoke 12, a disk-shaped magnet 14, and a plate 16, all of which are formed in a substantially circular shape in a plan view, and in this order, the central axis is from the outside of the frame 6. It is laminated along C. The yoke 12 has a side wall 12A extending along the central axis C, and a disk-shaped magnet 14 and a plate 16 are included inside the side wall 12A with a gap from the side wall 12A, and a magnetic gap g is formed by this gap. It is formed.
As described above, the magnetic circuit 8 is suspended coaxially with the central axis C of the frame 6 by the damper 10. The damper 10 is a thin plate-shaped member made of a metal such as stainless steel, and is provided around the magnetic circuit 8 as shown in FIG.

The voice coil bobbin 18 has a cylindrical shape having a diameter such that one end 18A enters the magnetic gap g of the magnetic circuit 8, and is housed in the frame 6 coaxially with the central axis C and under the magnetic circuit 8. Be done. A voice coil 9 to which a voice electric signal is applied is wound around one end portion 18A, and the voice coil 9 is arranged in a magnetic gap g. On the other hand, the other end 18B of the voice coil bobbin 18 is fixed to the plate portion 20 that closes the opening of the frame 6.

A signal line 21 is connected to the voice coil 9, and an electric voice signal is input from the signal line 21. A Lorentz force acts on the voice coil bobbin 18 and the magnetic circuit 8 in the direction of the central axis C of the frame 6 in response to the input of the voice electric signal, and the magnetic circuit 8 suspended by the damper 10 is the center of the frame 6. It vibrates in the direction of the axis C.

In the exciter 2, the magnetic circuit 8, the voice coil bobbin 18, and the frame 6 form a rotating body, and each of them is coaxially assembled to the central axis C of the frame 6. As a result, the center of gravity G of the exciter 2 is generally located on the central axis C or in the vicinity of the central axis C.

As shown in FIGS. 3 and 4, the vibration transmitting member 4 extends linearly from the vehicle-side fixing portion 30 fixed to the header panel 56 and the vehicle-side fixing portion 30, and the end portion 32TA thereof is a free end. The exciter 2 is fixed to the end 32TA of the free end of the extending portion 32.
According to this configuration, the exciter 2 is less likely to be exposed to sunlight as compared with the configuration in which the exciter 2 is directly fixed to the windshield 51F, and the exposure to sunlight is suppressed. In particular, the extending portion 32 extends in a direction away from the windshield 51F, so that exposure can be suppressed more reliably.
Further, since the vibration generator 1 is arranged in the space S behind the ceiling interior material, the vibration generator 1 does not obstruct or enter the view of the occupant.
Further, the exciter 2 can be arranged by extending the extending portion 32 in an appropriate direction according to the space around the header panel 56, and the vibration generator 1 can be used in a wide range of vehicle models having different peripheral structures of the header panel 56. Can be installed.

The vibration transmission member 4 of the present embodiment is configured by fixing a metal plate constituting the vehicle-side fixing portion 30 and a metal plate constituting the extending portion 32 by welding or the like.
Specifically, the vehicle-side fixing portion 30 is formed by bending a metal plate into an L-shaped cross section in accordance with the L-shaped cross section of the header panel 56. By such bending, a vehicle-side fixing portion 30 having a first fixing surface 30A and a second fixing surface 30B that come into surface contact with each of the first surface 56A and the second surface 56B of the header panel 56 is obtained. In the vehicle-side fixing portion 30, the first fixing surface 30A and the second fixing surface 30B are firmly fixed to the header panel 56 with an adhesive or an adhesive such as double-sided tape.

The extending portion 32 is a plate material having a predetermined length and a substantially rectangular shape in a plan view, has high thermal conductivity that transmits heat generated by the exciter 2 in the length direction, and has a vertical direction D due to vibration of the exciter 2. It is formed of a material (aluminum in this embodiment) that is flexible enough to bend in (FIG. 4).
Then, one end 32TB of the extending portion 32 is firmly fixed to the vehicle side fixing portion 30 by welding, an adhesive, an adhesive or the like. In the present embodiment, the extending portion 32 and the vehicle-side fixing portion 30 are joined to each other in a state where the upper surface 32A of the extending portion 32 has a predetermined area or more and is surface-bonded to the bottom surface of the first fixing surface 30A of the vehicle-side fixing portion 30. It is stuck.
The other end 32TA of the extending portion 32 extends by a predetermined distance from the coupling point 70 with the vehicle side fixing portion 30, and the exciter 2 is arbitrarily attached to the upper surface 32A of the end 32TA by an adhesive, double-sided tape, a screw, or the like. It is fixed by the fixing means of.

The area where the upper surface 32A of the extending portion 32 comes into surface contact with the first fixing surface 30A of the vehicle side fixing portion 30, and the other end 32TA (exciter) of the extending portion 32 from the coupling point 70 with the vehicle side fixing portion 30. The length up to the fixed position of 2), and the thickness, width, and rigidity of the extending portion 32 are appropriately adjusted based on the sound obtained by the vibration of the exciter 2 (particularly, the sound in the low frequency range).

In such a vibration generator 1, since the vehicle-side fixing portion 30 is fixed to the header panel 56 by the surfaces of the first fixing surface 30A and the second fixing surface 30B, the vibration of the exciter 2 is efficiently transmitted to the header panel 56. Be done.
Further, since the vehicle-side fixing portion 30 is fixed to the surface of the header panel 56 at two locations, the first fixing surface 30A and the second fixing surface 30B, vibration is transmitted more efficiently.
In addition to this, the vehicle-side fixing portion 30 has a fixed portion with the header panel 56 at the corner portion 56C (first surface 56A and second surface 56B) of the header panel 56 having an L-shaped cross section in the front-rear direction B of the vehicle 50. Intersection: There are two points with Fig. 3) in between. As a result, the vibration of the exciter 2 is suppressed in the header panel as compared with the configuration in which the vehicle side fixing portion 30 is fixed to only one of the first surface 56A and the second surface 56B on both sides of the corner portion 56C of the header panel 56. It can be efficiently transmitted to 56.

Further, even when a large acceleration vibration is applied to the exciter 2 due to the shaking of the vehicle 50 and an impact sound may be generated by the vibration, the impact sound is dispersed by appropriately bending the flexible extending portion 32. NS. As a result, it is possible to suppress the transmission of the impact sound while sufficiently transmitting the vibration generated by the exciter 2 itself to the header panel 56.
Further, since the extending portion 32 has a substantially rectangular shape in a plan view, vibration of sound corresponding to a high frequency range is emitted from the extending portion 32, and the sound quality is improved. In addition to this, the heat generated by the exciter 2 transferred to the extending portion 32 can be sufficiently dissipated from the entire surface of the extending portion 32, and the cooling performance of the exciter 2 can be improved.

As described above, according to the above-described embodiment, the following effects are obtained.

The vibration generator 1 of the present embodiment includes a vehicle-side fixing portion 30 fixed to the header panel 56 of the vehicle 50, and the vibration of the exciter 2 passes through the header panel 56 to the windshield of the vehicle 50 (in this embodiment, the windshield 51F). ).
As a result, the windshield can be vibrated more efficiently and the quality of the sound (especially the low-pitched sound) emitted in the vehicle interior can be improved as compared with the conventional configuration in which the vibrating body is directly attached to the windshield 51F. can.

The vibration generator 1 of the present embodiment has an extending portion 32 extending from the vehicle-side fixing portion 30 and having an end portion 32TA having a free end, and an exciter 2 is attached to the end portion 32TA of the free end of the extending portion 32. It is fixed.
As a result, as compared with the conventional configuration, the exciter 2 is less likely to be exposed to sunlight, and exposure to sunlight is suppressed.
Further, the exciter 2 can be arranged by extending the extending portion 32 in an appropriate direction according to the space around the header panel 56, and the vibration generator 1 can be used in a wide range of vehicle models having different peripheral structures of the header panel 56. Can be installed.

In the vibration generator 1 of the present embodiment, since the vehicle-side fixing portion 30 is fixed to the surface of the header panel 56 at two points, the vibration of the exciter 2 is more efficiently transmitted to the header panel 56, and the bass range is emphasized. Can make a sound. As a result, it is possible to make a profound and powerful sound reverberate in the passenger compartment.

In the vibration generator 1 of the present embodiment, the vehicle-side fixing portion 30 has two fixing portions fixed to the header panel 56, sandwiching the corner portion 56C of the header panel 56 having an L-shaped cross section. As a result, the exciter 2 has a structure in which the vehicle-side fixing portion 30 is fixed to only one of the surfaces (first surface 56A and second surface 56B) on both sides of the corner portion 56C of the header panel 56. The vibration can be efficiently transmitted to the header panel 56, and a sound with more emphasized bass can be emitted.

In the vibration generator 1 of the present embodiment, since the extending portion 32 has flexibility, even if a vibration of a large acceleration is applied to the exciter 2 due to the shaking of the vehicle 50 and the vibration may generate an impact sound, the extending portion 32 is extended. The impact sound is dispersed by appropriately bending the existing portion 32. As a result, it is possible to suppress the transmission of the impact sound while sufficiently transmitting the vibration generated by the exciter 2 itself to the header panel 56.

In the vibration generator 1 of the present embodiment, since the extending portion 32 has high thermal conductivity that conducts the heat generated by the exciter 2, the heat of the exciter 2 can be efficiently dissipated from the entire entire length thereof.

In the vibration generator 1 of the present embodiment, since the extending portion 32 has a plate shape, the heat dissipation area is increased, the cooling performance of the exciter 2 is improved, and the vibration sound in the high frequency range (that is, the sound in the high frequency range) of the exciter 2 is further improved. ) Can be reverberated from the surface 32A of the extending portion 32.

The above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

In the above-described embodiment, a configuration in which the extending portion 32 is surface-bonded to the first fixed surface 30A of the vehicle-side fixed portion 30 and extends substantially parallel to the first fixed surface 30A has been illustrated. However, if the extension portion 32 extends from the vehicle side fixing portion 30, the mounting mode of the extension portion 32 to the vehicle side fixing portion 30 can be appropriately changed. Examples of such mounting modes include aspects 1-1 to 1-3 shown in FIG. 7.
Aspect 1-1 is a mode in which the extending portion 32 is surface-joined to the second fixed surface 30B of the vehicle-side fixed portion 30 and extends substantially parallel to the second fixed surface 30B.
Aspect 1-2 is a mode in which the extending portion 32 is coupled to the corner portion 56C of the vehicle side fixing portion 30 and extends from the corner portion 56C.
Aspect 1-3 is a mode in which the vehicle-side fixing portion 30 is fixed to the upper surface of the header panel 56, and the extending portion 32 extends from the corner portion 56C of the vehicle-side fixing portion 30. According to the first to third aspects, since the exciter 2 is arranged on the upper surface side of the header panel 56, space saving can be achieved. Further, the vibration generator 1 can be installed even when the space S behind the ceiling interior material is small.

In the above-described embodiment, the vehicle-side fixing portion 30 and the extending portion 32 are each formed from different members (metal plates), but the present invention is not limited to this, and the vehicle-side fixing portion 30 and the extending portion 32 may be formed from one metal plate. ..
For example, as shown in aspect 2-1 of FIG. 8, by firmly fixing the end portion 32TB side of the extending portion 32 directly to the header panel 56 by adhesive or the like, the end portion 32TB side can be fixed. It may be configured as a vehicle-side fixing portion 30. In this configuration, the extending portion 32 is fixed to either the first surface 56A or the second surface 56B of the header panel 56.

Further, in any of aspects 2-1 of FIG. 8, the above-described embodiment (FIG. 3), and aspects 1-1 to 1-3 of FIG. 7, as shown in aspect 2-2 of FIG. 8, the header A rod-shaped support portion 80 extending between the panel 56 and the extension portion 32 and supporting the extension portion 32 on the header panel 56 may be provided on the vehicle side fixing portion 30. In this case, the fixing portion where the support portion 80 is fixed to the header panel 56 also corresponds to one of the fixing portions where the vehicle side fixing portion 30 is fixed to the header panel 56. Therefore, when the support portion 80 shown in the aspect 2-2 is provided in any of the above-described embodiments and the aspects 1-1 to 1-3 of FIG. 7, the fixing points are the first fixing surface 30A and the first fixing surface 30A. 2 There are three points, the fixed surface 30B and the support portion 80. The number of fixed points may be 4 or more.

The first fixed surface 30A and the second fixed surface 30B of the vehicle-side fixed portion 30 may be extended in the vehicle width direction E at least longer than the width of the extending portion 32. According to this configuration, since the areas of the first fixed surface 30A and the second fixed surface 30B are expanded, the vibration generator 1 can be more firmly fixed to the header panel 56.

In the present specification, directions such as horizontal, vertical, and vertical directions, various numerical values, and shapes are consciously defined in these directions, the range around the numerical values, and the approximate shape, unless otherwise specified. It is not excluded from the above, but includes the range around it and the approximate shape (so-called equal range) as long as it has the same effect and the numerical value does not deviate from the critical significance. That is, for example, the directions such as horizontal, vertical, and vertical directions may be substantially horizontal, substantially vertical, and substantially vertical directions, respectively.

1 Vibration generator 2 Exciter (Vibration generator)
4 Vibration transmission member 30 Vehicle side fixed part 30A 1st fixed surface 30B 2nd fixed surface 32 Extended part 32TA Free end side end 50 Vehicle 51F Windshield 53 Opening 54 Roof panel 55 Ceiling interior material 56 Header panel 56C corner Part 70 Joint point 80 Support part S Ceiling interior material Backside space

Claims

The vibration generating part that generates vibration and the vibration generating part
It is equipped with a vehicle-side fixing part that is fixed to the header panel of the vehicle.
A vibration generator characterized in that the vibration of the vibration generating unit is transmitted to the window glass of the vehicle through the header panel.
An extension portion extending from the vehicle-side fixing portion and having a free end at the end is provided.
The vibration generator according to claim 1, wherein the vibration generating portion is fixed to the end of the free end of the extending portion.
The vehicle-side fixing portion is
The vibration generator according to claim 2, wherein the vibration generator is fixed to the header panel at two or more places.
The header panel has an L-shaped cross section and has an L-shaped cross section.
The vehicle-side fixing portion is
The fixing points fixed to the header panel include at least two points sandwiched by the corners of the L-shaped cross section of the header panel.
The vibration generator according to claim 3.
The vibration generator according to any one of claims 2 to 4, wherein the extending portion has flexibility.
The vibration generator according to any one of claims 2 to 5, wherein the extending portion has high thermal conductivity that conducts heat generation of the vibration generating portion.
The vibration generator according to any one of claims 2 to 6, wherein the extending portion has a plate shape.