JP2021024322A - Mounting structure of sound emitter and vehicle mounted with sound emitter - Google Patents

Abstract

To provide a mounting structure that can achieve high sound pressure level without increasing output, when a sound emitter emits sound.SOLUTION: A recessed part 1011 is formed in a front bumper 1010, and a sound emitter S is arranged in the recessed part 1011. A lower side of the recessed part 1011 is configured to open, and an emitting direction of sound from an emission hole 61 of the sound emitter S is made to match an opening direction of the recessed part 1011. That is, in the emitting direction of the sound from the emission hole 61, the recessed part 1011 is opened to constitute a clearance serving as a passageway for sound. This ensures that when the sound emitter S emits sound such as approach-notification sound, the sound can be emitted through a space between a number plate 1000 and the bumper 1010 without being interrupted by the other member so as to be transmitted to the circumference thereof.SELECTED DRAWING: Figure 13

Description

The present invention relates to a sounding device mounting structure and a vehicle to which the sounding device is mounted.

Conventionally, a sounding device having a degree of freedom in mounting conditions such as the mounting direction and angle has been mounted on the back of the front grill or the tire house in the engine room so that it can be mounted anywhere in the vehicle. Examples of such a sounding device include those shown in Patent Document 1.

In this sounding device, a housing is formed by covering both ends of a base having a cylindrical base cylinder with a cover and a case, the sounding body is arranged in the housing, and a sound emitting hole is provided in the center of the cover. , The sound emitted from the sounding body is emitted from the sound emitting hole. Further, in this sounding instrument, a plurality of sound emitting holes are arranged in an annular shape at the front and side positions of the sounding device, specifically, at the center position of the cover facing the sounding body and the side surface position of the base. It is configured to be able to emit sound in front of and around the sound generator.

Japanese Unexamined Patent Publication No. 2018-12149

However, in the sounding body shown in Patent Document 1, since a plurality of sound emitting holes are arranged in an annular shape on the side surface of the base and in the center of the cover so that they can be mounted anywhere in the vehicle, the sound is emitted. Sound is inevitably emitted from the sound emitting holes in directions that are not needed. Therefore, there is a problem that noise in the vehicle interior can be generated by transmitting or propagating the sound into the vehicle interior.

Further, when the sounding body shown in Patent Document 1 is mounted on a vehicle, sound is emitted from the front of the sounding device, and it is necessary to secure a space for a sound passage on the cover side. Therefore, the front of the sounding body. Vehicle parts cannot be mounted in close proximity to the vehicle. Therefore, there is a problem that the sounding device cannot be arranged in the narrow space of the vehicle.

Therefore, the present inventors have found a sounding device capable of emitting sound in only one direction (Japanese Patent Application No. 2019-45656), and use this sounding device to suppress the generation of vehicle interior noise while suppressing the generation of vehicle interior noise. We examined how to install it in a narrow space. Further, when the sounding device is applied to the vehicle approach notification device, it is also necessary to mount the sound device in a narrow space of the vehicle so that the sound pressure required by the law and regulation of the vehicle approach notification can be obtained. Specifically, according to the laws and regulations for vehicle approach notification, sound is produced with the vehicle approach notification device mounted on the vehicle, and sound pressure is measured at a predetermined microphone position to obtain sound pressure above the minimum value. It demands that it is. If you increase the output of the sound generator, the sound pressure level will meet the requirements of laws and regulations, but if you increase the output, it will cause noise in the passenger compartment. It is desirable to be able to obtain a satisfactory sound pressure level.

In view of the above points, a first object of the present invention is to provide a mounting structure capable of achieving a high sound pressure level without increasing the output when sound is produced from a sounding device. Another object of the second object is to provide a sounding device mounting structure and a vehicle equipped with a sounding device, which can further reduce vehicle interior noise and obtain a desired sound pressure level at a predetermined microphone position. ..

In order to achieve the above object, the invention according to claim 1 is a structure in which a sounding device (S) that produces sound by vibrating a diaphragm (72) is attached to a vehicle, and the sounding device emits sound. The number plate (61) on the front side of the vehicle is provided with a sound emitting hole (61), and the sound emitting direction, which is the direction in which sound is emitted from the emitting hole, is unidirectional, and the sound emitting direction is directed downward. It is attached between the 1000) and the front bumper (1010) or on the back side of the front bumper, and the lower part of the discharge hole in the sounding device is an open space.

In this way, the sound generator is attached between the license plate on the front side of the vehicle and the front bumper or on the back side of the front bumper. The space below the discharge hole in the sounding device is an open space. For this reason, in the direction in which sound is emitted from the emission hole, a gap that serves as a sound passage is formed by providing an open space. As a result, when a sound is produced from the sounding device, the sound emitted from the sounding device can be emitted without being blocked by other members and transmitted to the surroundings. Therefore, it is possible to have a mounting structure that can realize a high sound pressure level without increasing the output.

In the invention according to claim 2, a recess (1011) having an opening at the bottom is formed at a position of the front bumper where the license plate is attached, and the sounding device is arranged in the recess to form a sounding device. It is installed between the license plate and the front bumper.

In this way, a recess having an opening at the bottom can be formed at a position of the front bumper where the license plate is attached, and the sound generator can be arranged in the recess.

In the invention according to claim 3, an opening (1017) from which the connector (1020) and the wire harness (1021) are pulled out from the vehicle side is formed in the recess in the front bumper, and the vehicle is pulled out through the opening. The connector on the side is connected to the connector (29) provided on the sounding device.

When the sounding device is arranged in the recess of the front bumper in this way, if an opening is formed in the recess, the connector and the wire harness from the vehicle side can be pulled out through the opening, and the connector on the vehicle side is sounded. It can be connected to the connector provided on the device.

In the invention according to claim 4, in the sounding device, the vibration direction of the diaphragm is directed to the front-rear direction of the vehicle, and the front-rear dimension of the vehicle in the recess is larger than the dimension in the same direction in the sounding device. ..

In this way, if the front-rear dimension of the vehicle in the recess is made larger than the dimension in the same direction in the sounding device, the license plate can be attached to the front bumper without interfering with the sounding device.

In the invention according to claim 5, the front bumper has a front grill (1010a) below the position where the sounding device is attached, and the end of the front grill on the front end side of the vehicle is closer to the bottom surface of the recess. It is located on the rear side of the vehicle.

With such a configuration, there is no member facing the discharge hole around the discharge hole, and the circumference of the discharge hole can be an open space.

In the invention according to claim 6, a bracket (1100) for attaching the license plate to the front bumper is provided between the front bumper and the license plate, and the sounding device is arranged on the bracket so that the sounding device is the license plate and the front bumper. It is attached between and.

In this way, the sounding device can be attached to the bracket arranged between the license plate and the front bumper.

In the invention according to claim 7, the bracket is a mounting surface (1101), a partition wall (1103) erected from the mounting surface toward the rear of the vehicle, and a portion of the partition wall located below. It has a mounting portion (1104) that is erected upward from the lower wall surface (1103a) and has an opening (1103b) that has an opening on the lower wall surface inside, and a sounding device is provided in the mounting portion. The discharge hole is arranged toward the opening.

In this way, a mounting portion is provided at a lower position of the bracket, and an opening is formed inside the mounting portion so that sound is emitted through the opening. Even in this way, when the sound is produced from the sound generator, the sound emitted from the sound generator is emitted through between the license plate and the bumper without being blocked by other members, and is transmitted to the surroundings. Can be done.

In the invention according to claim 8, the mounting portion has an overhanging portion (1104a) overhanging inside the mounting portion, and also has a snap fit (1104b), and the sounding device is a wall (1104b) constituting a discharge hole. 22, 23, 27) has protrusions (22a, 23a) at the tip, and one surface formed by the tip of the wall forming the discharge hole is designated as the discharge surface (62), and the discharge surface abuts on the overhanging portion. At the same time, the protrusion is fixed to the mounting portion by being engaged with the snap fit.

In this way, the mounting portion has a structure in which an overhanging portion is provided inside the mounting portion and a snap fit is provided, and a protrusion is provided at the tip of the wall constituting the internal discharge hole of the sounding device. Then, the sounding device can be fixed to the mounting portion by engaging the snap fit with the protrusion.

In the invention according to claim 9, the front bumper is formed with an opening (1017) from which a connector (1020) and a wire harness (1021) are pulled out from the vehicle side, and the connector on the vehicle side is pulled out through the opening. Is connected to the connector (29) provided on the sounding device, and the height of the mounting portion from the overhanging portion is smaller than the distance from the emission surface of the sounding device to the connector provided on the sounding device. There is.

In this way, when the bracket is provided with a sounding device, if an opening is formed in the front bumper, the connector and the wire harness from the vehicle side can be pulled out through the opening, and the connector on the vehicle side can be used as the sounding device. It can be connected to the provided connector. Further, if the height of the mounting portion from the overhanging portion is smaller than the distance from the emission surface of the sounding device to the connector provided in the sounding device, the mounting portion and the connector can be prevented from interfering with each other.

In the invention according to claim 10, the sounding device is fixed to the back surface of the front bumper, the front bumper has a downward opening (1013c) formed below the sounding device, and the sounding device directs the discharge hole toward the opening. Are arranged.

In this way, the sounding device can be fixed to the back surface of the front bumper. In this case, by providing the front bumper with an opening below the sounding device, the space below the sounding device can be made an open space. In this case, as described in claim 11, for example, the sounding device may be configured to enter the opening. Further, as described in claim 12, a frame-shaped cushioning material corresponding to the discharge hole may be arranged between the tip of the sounding device and the front bumper. By arranging the cushion material in this way, it is possible to further suppress sound leakage from the sounding device into the bumper.

In the invention of claim 13, the sounding device is covered by a license plate when viewed from the front of the vehicle. In this way, by making the sound generator covered with a license plate, it is possible to prevent the design from being deteriorated.

As described above, the mounting structure according to any one of claims 1 to 13 can be applied to, for example, a vehicle to which a sounding device is mounted. In a sounding device that produces an approach notification sound in a vehicle, it is necessary to obtain a desired sound pressure level at a predetermined microphone position. Therefore, as in the mounting structure according to any one of claims 1 to 13, when sound is produced from the sounding device, the sound emitted from the sounding device is emitted without being interrupted by other members. If the structure can be transmitted to the surroundings, the noise in the vehicle interior can be further reduced, and the sound pressure level can be obtained at a predetermined microphone position.

The reference numerals in parentheses attached to each component or the like indicate an example of the correspondence between the component or the like and the specific component or the like described in the embodiment described later.

It is a front view of the sounding apparatus which concerns on 1st Embodiment. It is a bottom view of the sounding apparatus shown in FIG. It is a top view of the sounding apparatus shown in FIG. It is a right side view of the sounding instrument shown in FIG. It is a rear view of the sounding instrument shown in FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. It is sectional drawing of VII-VII in FIG. It is VIII-VIII sectional view in FIG. It is a rear view of the sounding instrument with the case removed. It is sectional drawing of the sounding instrument which showed the state at the time of the airtightness inspection. It is an enlarged view which showed the state which a stopper and a diaphragm are in contact with each other at the time of an airtightness inspection. It is a partially transparent front view which showed the appearance which the sound generator was attached to the front bumper on the back side of a license plate. It is sectional drawing of XIII-XIII in FIG. It is sectional drawing of XIV-XIV in FIG. FIG. 12 is a view from below. FIG. 12 is a view seen from diagonally above right. It is a front view which showed the mounting structure of the sounding instrument when the license plate was removed. FIG. 17 is a view seen from diagonally above right. FIG. 17 is a view seen from diagonally lower right. It is a partially transparent front view which showed the state which attached the sounding instrument to the bracket on the back side of the license plate which concerns on 2nd Embodiment. It is a cross-sectional view of XXI-XXI of FIG. FIG. 20 is a view from below. FIG. 21 is a cross-sectional view of the lower portion passing through the sounding device cut in the vertical direction. It is a perspective view of FIG. It is a front view which shows the state which the license plate is removed. FIG. 25 is a view seen from diagonally above right. It is a perspective view which looked at the bracket from the diagonally upper right side on the front side. It is a perspective view which saw the bracket on the back side from the diagonally upper left. It is a partially transparent front view which showed the state which attached the sounding instrument to the back side of the front bumper which concerns on 3rd Embodiment. It is a cross-sectional view of XXX-XXX of FIG. FIG. 30 is a view from below. It is a figure seen from the back side of a front bumper. It is a perspective view of FIG. It is a perspective view which looked at the back surface of the front bumper from the diagonally upper left. FIG. 29 is a view seen from diagonally below. It is a figure which showed the modification of the shape of the opening when the sounding apparatus is attached to the back surface of the front bumper described in another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, parts that are the same or equal to each other will be described with the same reference numerals.

(First Embodiment)
The first embodiment will be described. In the present embodiment, a case where the sounding device is attached to the back side of the license plate on the front side in the vehicle, that is, between the license plate and the front bumper will be described.

The sounding device makes a sound by a sounding body arranged in the housing. In the present embodiment, the sound generator has a structure in which the sound is emitted in only one direction, and by attaching this sound generator to the front of the vehicle, a path for producing sound while approaching a predetermined microphone position is secured. Make it possible to obtain the sound pressure level required by law even at low output. First, the specific structure of this sounding device will be described with reference to FIGS. 1 to 11.

As shown in FIGS. 1 to 6, the housing 1 of the sounding device S is composed of two parts, a resin base 2 and a case 3, respectively.

The base 2 includes a substantially long cylindrical base cylinder portion 21, and a protective wall 22 is formed so as to cover an opening on one end side in the axial direction of the base cylinder portion 21, and an opening on the other end side. The oval plate-shaped case 3 is fitted so as to cover the portion, and is airtightly joined by adhesion. The sounding body 7, which will be described later, is assembled to the opening on the other end side of the base cylinder 21, and the sounding body 7 is assembled by airtightly adhering the oval case 3 to this opening. The waterproof and airtightness of the side is ensured.

As shown in FIG. 6, the protective wall 22 is connected to the base cylinder portion 21 by a standing wall 23 erected along a portion of the outer edge of the base cylinder portion 21 other than one direction, and the base cylinder portion 21 is connected to the base cylinder portion 21. A gap of a predetermined size Ya is provided between the partition wall 24 and the one surface 24a forming the end surface on one end side of the partition wall 24. The protective wall 22 covers the opening on one end side of the base cylinder portion 21, more specifically, the sounding body 7 located inside the opening on the one end side so as not to be directly viewed from the front direction (normal direction in FIG. 1). As a result, the invasion of foreign matter such as water, snow, and flying stones into the sounding body 7 is suppressed.

Then, as shown in FIGS. 6 and 7, the space in the base cylinder portion 21 is divided into two by the partition wall 24 provided in the base cylinder portion 21. Specifically, the partition wall 24 is provided with a sound emitting hole 25 for guiding the sound generated by the sounding body 7 and a beam portion 26 around the sound emitting hole 25, and sounds so as to cover the sound emitting hole 25 and the beam portion 26. By arranging the body 7, the space inside the base cylinder portion 21 is divided into two. The first space 4 is formed by the base cylinder portion 21, the partition wall 24, and the diaphragm 72 provided in the sounding body 7, and the second space 5 is formed by the base cylinder portion 21, the partition wall 24, the case 3, and the diaphragm 72. ..

Further, the first space 4 is also in communication with the sound emitting space 6 to be described later, which is composed of the protective wall 22 and the standing wall 23, and the sound emitted to the first space 4 is transmitted to the lower part of FIG. 1 through the sound emitting space 6. It is designed to be output from the discharge hole 61 provided. The output direction of the sound from the emission hole 61 corresponds to the sound emission direction.

As shown in FIGS. 1 and 8, the partition wall 24 is formed in a substantially oval shape, and a base cylinder portion 21 is provided so as to project from the protective wall 22 on the outer edge portion thereof. Then, a standing wall 23 is formed along the outer periphery of the base cylinder portion 21 and the partition wall 24 so as to be along the half of the elliptical shape divided along the major axis, and further, the tangential direction from both ends in the longitudinal direction of the elliptical shape, in other words. Then, the standing wall 23 extends in the discharge direction.

In the case of the present embodiment, the protective wall 22 and the vertical wall 23 are extended so as to project toward the discharge direction side with respect to the base cylinder portion 21. Further, as shown in FIGS. 2 and 7, the protective wall 22 is opposed to the protective wall 22 with the base cylinder 21 sandwiched so as to face the portion of the protective wall 22 extending so as to protrude from the base cylinder 21. The facing wall 27 is formed on the side. Then, the protective wall 22, the standing wall 23, and the facing wall 27 are opened in one direction intersecting in the vibration direction. As a result, as shown in FIG. 2, a discharge hole 61 surrounded by the protective wall 22, the standing wall 23, and the facing wall 27 is formed, and the protective wall 22, the standing wall 23, and the partition wall are further inside the housing 1 from the discharge hole 61. A sound emitting space 6 surrounded by 24 is configured. As shown in FIG. 2, the discharge hole 61 has a predetermined width W1 and has a flat shape whose longitudinal direction is orthogonal to the width direction, so that the discharge hole 61 can be easily applied to a vehicle. ing. That is, the discharge hole 61 has a horizontally long shape in which the vertical wall 23 is shorter than the protective wall 22 so that the vertical wall 23 is in the lateral direction and the protective wall 22 is in the longitudinal direction. Has been done. Therefore, the thickness of the product can be reduced by setting the vibration direction of the diaphragm 72 to the short direction, and the opening area required for producing sound pressure can be secured even in the horizontally long shape.

As shown in FIG. 5, the protective wall 22, the vertical wall 23, and the facing wall 27 have a structure in which they protrude from the base cylinder portion 21 by a predetermined length P1, but they do not have to protrude. However, if these are constructed so as to protrude, the resonance effect of sound can be obtained by adjusting the length, and the sound quality and sound pressure can be changed by adjusting the resonance frequency. Further, since the protective wall 22, the standing wall 23, and the facing wall 27 have a structure that protrudes from the base cylinder portion 21, the facing wall 27 is provided, but if the structure does not protrude, the facing wall 27 is not provided. You may.

As shown in FIGS. 1, 7, and 8, the tips of the protective wall 22, the standing wall 23, and the facing wall 27 are terminated in the same plane. Hereinafter, one surface formed by the tips of the protective wall 22, the vertical wall 23, and the facing wall 27 is referred to as a discharge surface 62. In the case of the present embodiment, the discharge surface 62 is a plane parallel to the vibration direction of the diaphragm 72 as shown in FIG. 7, and is a plane parallel to the longitudinal direction of the base cylinder portion 21 as shown in FIG. It is said that. The sound output from the discharge hole 61 is emitted centering on the normal direction of the discharge surface 62 and transmitted to the outside. Therefore, the sound emission direction is specified based on the position of the emission hole 61 and the normal direction of the emission surface 62.

Further, as a sound emitting region in which a sounding body 7 that generates sound based on an electric signal is arranged in a region near the central portion of the partition wall 24, as shown in FIGS. 1 and 8, the partition wall 24 is used in the sound emitting region. A plurality of sound emitting holes 25 formed by forming through holes are formed in the above. Then, as shown in FIGS. 6 and 7, the sounding body 7 is arranged in the second space 5 so as to close the sound emitting hole 25. More specifically, the sound emitting hole 25 is closed by a diaphragm 72 provided in the sounding body 7. Therefore, the second space 5 is separated from the first space 4 by the diaphragm 72.

The airtightness between the first space 4 and the second space 5 is ensured by the diaphragm 72 or the like. Therefore, in order to suppress fluctuations in the pressure applied to the diaphragm 72 due to temperature changes, as shown in FIGS. 1 and 8, the partition wall 24 has a vent hole for communicating both spaces at a location different from the sound emitting region. 241 is formed. A ventilation film 242 made of a material that allows air to pass through and blocks water is attached to the ventilation hole 241, and the pressure fluctuation applied to the diaphragm 72 is adjusted by the ventilation film 242.

As shown in FIGS. 1 and 6 to 8, the portion of the sound emitting region other than the sound emitting hole 25 is a beam portion 26, and the beam portion 26 is provided on one surface of the beam portion 26 on the diaphragm 72 side. A stopper 261 configured to be partially projected is formed. As shown in FIGS. 1 and 8, in the case of the present embodiment, the beam portion 26 has a configuration having a radial beam 262 extending radially from the center of the sound emitting region and a circular beam 263 arranged concentrically. Has been done. Further, in the case of the present embodiment, three circular beams 263 are provided.

In this embodiment, six radial beams 262 are provided at equal intervals. At an angle of 120 °, three of the circular beams 263 are formed from the innermost one to the outer circumference of the sound emitting region, and the remaining three are the second of the circular beams 263. It is formed from to the outer circumference of the sound emitting region.

Since the beam portion 26 covers the region other than the sound emitting hole 25 in the sound emitting region, it suppresses the arrival of water and stepping stones during traveling to the sounding body 7, and the sound is produced by contact with water or stones. Prevent damage to the body 7. In the present embodiment, one surface 24a of the partition wall 24 including the beam portion 26 facing the protective wall 22 is a flat surface, but may have irregularities. However, when the entire base 2 is manufactured by resin molding at one time, the slide mold is arranged between the one surface 24a and the protective wall 22, so that the slide mold can be die-cut.

Further, the stopper 261 contacts the diaphragm 72 when the diaphragm 72 is displaced during the airtightness inspection, and limits the displacement of the diaphragm 72 in the vibration direction. As a result, damage due to excessive deformation of the diaphragm 72 is suppressed. As shown in FIGS. 6 and 7, the stopper 261 is arranged so as to face the diaphragm 72, and has a shape corresponding to the diaphragm 72.

Specifically, the stopper 261 is configured by projecting the second of the radial beam 262 and the three circular beams 263 from the center toward the diaphragm 72 side. The portion of the stopper 261 that protrudes from the circular beam 263 constitutes a cylindrical portion 261a that protrudes in a circular shape along the circular beam 263. Further, the portion of the stopper 261 that protrudes from the radial beam 262 constitutes an inclined portion 261b that is inclined outward in the radial direction with the cylindrical portion 261a as the center. Assuming that the distance from one surface 24a of the stopper 261 is the height, the cylindrical portion 261a has the same height all around and is the highest. Further, the inclined portion 261b has the same height as the cylindrical portion 261a at the portion connected to the cylindrical portion 261a, and the height is gradually lowered as the inclined portion 261b is separated from the cylindrical portion 261a.

The inclined portion 261b is formed on all of the radial beams 262, but only a part thereof, for example, the one formed from the second circular beam 263 to the outer periphery of the sound emitting region, conversely, the first. It may be formed only on the one formed from the circular beam 263 on the inner peripheral side to the outer periphery of the sound emitting region.

As shown in FIGS. 1 to 4 and 6 to 9, the sounding body 7 is electrically connected to the vehicle-side connector 1020 and the wire harness 1021 shown in FIG. 12, which will be described later, on the outside of the base cylinder portion 21. A substantially square tubular connector 29 is formed. The connector 29 intersects the vibration direction of the diaphragm 72 and is provided along the direction parallel to the partition wall 24 on the outside of the vertical wall 23, so that the thickness of the product can be reduced. As shown in FIG. 6, a through hole 291 is formed in a portion of the base cylinder portion 21 where the connector 29 is formed, which penetrates the base cylinder portion 21 and connects the inside of the connector 29 and the second space 5. The terminal 9 is press-fitted so as to pass through the through hole 291.

The terminal 9 is fixed to the base cylinder 21 by an adhesive inside the base cylinder 21, and the through hole 291 formed for arranging the terminal 9 is closed by the adhesive and the terminal 9. It has been. The terminal 9 is connected to a lead pin 78, which will be described later, in the second space 5.

As shown in FIG. 6, the terminal 9 has a flat plate rod-shaped terminal portion 91 having one direction as the longitudinal direction, and a connecting portion 92 connected to the lead pin 78. The terminal portion 91 is a portion to be inserted into the through hole 291 and is arranged so that one end is located on the second space 5 side and the other end is located inside the connector 29. The connecting portion 92 is connected to one end of the terminal portion 91 located on the second space 5 side, and has a shape bent in a direction intersecting the longitudinal direction of the terminal portion 91, or in a direction orthogonal to the longitudinal direction of the terminal portion 91. ing.

As shown in FIGS. 6, 7, and 9, the sounding body 7 includes a frame 71, a diaphragm 72, and a drive unit 73 that vibrates the diaphragm 72.

The frame 71 has a substantially stepped cylindrical shape and is made of resin. The frame 71 has openings at both ends in the axial direction, and includes a cylindrical portion 711 having a wider opening width forming one opening and a cylindrical portion 712 having a narrow opening width forming the other opening. , It has a disk-shaped stepped portion 713 that connects the cylindrical portion 711 and the cylindrical portion 712. The opening formed by the cylindrical portion 711 is closed by the diaphragm 72. The frame 71 is fixed to the base 2 by being hermetically bonded to the partition wall 24 at the end on the side where the opening is closed by the diaphragm 72.

Further, as shown in FIGS. 6 and 9, a through hole 714 is formed in the stepped portion 713 to communicate the inside and the outside of the frame 71, and the second through hole 714 communicates inside and outside the frame 71. Space 5 is configured. The second space 5 is separated from the first space 4 by a partition wall 24 and a diaphragm 72.

The diaphragm 72 constitutes a diaphragm, and generates sound by being vibrated. As shown in FIG. 6, the inner peripheral portion 721 of the diaphragm 72 has a convex shape that is convex toward the first space 4 side. Further, the outer peripheral portion 722 of the diaphragm 72 is inclined toward the first space 4 side. Specifically, the outer peripheral portion 722 has a hollow truncated cone shape that extends from the outer edge of the inner peripheral portion 721 toward the first space 4 side.

The circular boundary between the inner peripheral portion 721 and the outer peripheral portion 722 and the cylindrical portion 261a of the stopper 261 have the same diameter and are arranged so as to face each other. Further, the inclination of the outer peripheral portion 722 and the inclination portion 261b have the same shape and are arranged to face each other. Further, as shown in FIG. 6, at the circular boundary portion between the inner peripheral portion 721 and the outer peripheral portion 722, the diaphragm 72 faces the cylindrical portion 261a and is most displaced in the vibration direction of the diaphragm 72 when the diaphragm 72 is displaced. A circular end 723 is formed. When the diaphragm 72 is displaced during the airtightness inspection, the cylindrical portion 261a abuts on the circular end portion 723 and the inclined portion 261b abuts on the outer peripheral portion 722 as shown in FIGS. 10 and 11. In the circular end portion 723, one end of the bobbin 74 provided on the sounding body 7 is fixed with an adhesive on the drive unit 73 side, and the bobbin 74 and the diaphragm 72 are integrated. Therefore, it becomes a high-strength portion of the diaphragm 72, and the cylindrical portion 261a can be brought into contact with the hard and high-strength portion.

As will be described later, in the sounding body 7, sound is generated by the vibration of the diaphragm 72. In order to generate a sound having a sufficiently high sound pressure, it is necessary to increase the distance between the diaphragm 72 and the stopper 261 to some extent. Therefore, the distance between the surface of the diaphragm 72 that contacts the stopper 261 and the surface of the stopper 261 that contacts the diaphragm 72 is such that the diaphragm 72 does not come into contact with the stopper 261 depending on the sounding operation. It is made larger than the displacement amount of. Then, during the airtightness inspection, the diaphragm 72 is displaced more than during the sounding operation and comes into contact with the stopper 261.

For example, the distance between the surface of the diaphragm 72 that contacts the stopper 261 and the surface of the stopper 261 that contacts the diaphragm 72 is about 1 mm to 3 mm.

Further, at the end of the outer peripheral portion 722 opposite to the inner peripheral portion 721, the shape of the outer peripheral portion 722 as viewed from the axial direction is ring-shaped, and the cross section along the radial direction is S-shaped. The unit 724 is connected. The diaphragm 72 is adhered to the frame 71 at the end of the spring portion 724. In the present embodiment, the inner peripheral portion 721, the outer peripheral portion 722, the circular end portion 723, and the spring portion 724 are formed of a single thin film.

The drive unit 73 is arranged so as to close the cylindrical portion 712 having the narrower opening width of the two openings of the frame 71. As shown in FIG. 6, the drive unit 73 includes a bobbin 74, a voice coil 75, and a magnetic circuit unit 76.

The bobbin 74 has a cylindrical shape, is connected to the back surface of the circular end portion 723 at the outer edge of the inner peripheral portion 721 of the diaphragm 72, and stands upright from the diaphragm 72 toward the inside of the second space 5. A voice coil 75 is wound around the outside of the bobbin 74. The bobbin 74 corresponds to the core portion.

The magnetic circuit unit 76 is for applying a magnetic field to the voice coil 75, and is a disk-shaped magnet 761 having one surface and another surface, a top plate 762 connected to one surface of the magnet 761, and a magnet 761. It has a yoke 763 connected to the other side. The magnetic circuit portion 76 is formed by arranging the magnet 761 and the top plate 762 at the bottom of the yoke 763, and a gap is provided between the cylindrical portion of the yoke 763 and the magnet 761 and the top plate 762. The bobbin 74 and the voice coil 75 are arranged so as to be inserted therein. The yoke 763 is fitted and adhered to the inside of the cylindrical portion 712 from the opening entrance side of the cylindrical portion to the entire outer peripheral portion, so that the magnetic circuit portion 76 is integrated with the frame 71.

With this configuration, a magnetic field generated between the side surface of the top plate 762 and the side surface of the cylindrical portion of the yoke 763 is applied to the voice coil 75 wound around the bobbin 74. There is. Therefore, when a current is passed through the voice coil 75 in which a magnetic field is applied, the bobbin 74 is displaced in the axial direction while being fitted in the cylindrical portion of the yoke 763. As a result, the diaphragm 72 vibrates and a sound is generated.

Further, the sounding body 7 includes a lead pin 78 electrically connected to the voice coil 75. Although not shown, the lead pin 78 is electrically connected to the voice coil 75 by soldering or the like, and is drawn out from the voice coil 75 in the radial direction. In the present embodiment, the lead pin 78 is integrated with the frame 71 by integral molding or the like, extends to the outside of the frame 71, and is laid out so as to be in contact with the terminal 9. Then, as shown in FIG. 9, the lead pin 78 is press-fitted into the connection groove formed in the terminal 9, so that the voice coil 75 can be electrically connected to the outside.

As described above, the sounding device S of the present embodiment is configured. The sounding device S configured in this way is arranged outside the vehicle interior, and as described later, is arranged between the license plate on the front side of the vehicle and the front bumper in the present embodiment. Then, when the voice coil 75 is energized based on the sound source signal from the outside of the sounding device S, the diaphragm 72 vibrates in the vibration direction shown in FIGS. 2 and 7, and the sounding body 7 emits sound. .. This sound passes through the first space 4, the sound emitting hole 25, the sound emitting space 6, and the like, and is emitted to the outside from the emission hole 61. As a result, even in a vehicle such as an electric vehicle in which the running noise is quiet, it is possible to notify the surroundings of the approaching vehicle by generating an alarm sound from the sounding device S.

In addition, an airtightness inspection process is performed as one of the manufacturing processes of the sounding device S. During this airtightness inspection step, a pressure difference is generated between the first space 4 and the second space 5. Specifically, the second space 5 is pressurized by sending air from the discharge hole 61 side through the ventilation hole 241 so that the pressure in the second space 5 becomes higher than the pressure in the first space 4. As a result, as shown in FIGS. 10 and 11, the inner peripheral portion 721 and the outer peripheral portion 722 of the diaphragm 72 are displaced toward the first space 4 based on the deformation of the spring portion 724, and the diaphragm 72 is displaced toward the first space 4. It deforms so that it bulges to the side.

At this time, the deformed diaphragm 72 comes into contact with the stopper 261, which limits the deformation of the diaphragm 72. That is, the stopper 261 arranged inside the housing 1 suppresses the inversion and deformation of the diaphragm 72 instead of the jig that holds the diaphragm 72. Therefore, the airtightness inspection can be performed without using a jig for pressing the diaphragm 72. Further, when the diaphragm 72 contacts the stopper 261, the circular end portion 723 abuts on the cylindrical portion 261a and the outer peripheral portion 722 abuts on the inclined portion 261b, but the inner peripheral portion 721 having low strength is inside the cylindrical portion 261a. It is located at and does not touch the stopper 261. Therefore, the diaphragm 72 can be protected from damage.

Since the sounding device S having such a structure is provided with the protective wall 22 so as to cover the sound emitting hole 25, the sound emitting hole 61 is provided through the sound emitting space 6 composed of the protective wall 22, the vertical wall 23, the partition wall 24, and the like. It is output. That is, the sound emitted by the sounding body 7 can be output from one direction. Therefore, it is possible to suppress that the sound is emitted in a direction that is not required, and it is possible to suppress that the unnecessary sound permeates or propagates into the vehicle interior.

Further, a protective wall 22 is provided so as to cover the sound emitting hole 25 at a position in front of the sounding device S, that is, in the vibration direction of the diaphragm 72. Therefore, it is not necessary to secure a space serving as a sound passage at a position adjacent to the protective wall 22 in the mounting space of the sounding device S in the vehicle. That is, the vehicle parts can be mounted in the vicinity of the protective wall 22, and the sounding device S can be arranged even in a narrow space of the vehicle. Therefore, it is possible to make the sounding device S capable of arranging the vehicle parts close to the front position.

Further, in the sounding device S having the structure of the present embodiment, the housing 1 can be formed by molding. For example, a lower mold for forming the outer wall surface of the protective wall 22 and the vertical wall 23 of the housing 1, an upper mold for forming the inner wall surface of the base cylinder portion 21 and the partition wall 24, and a sound emitting space 6 are formed. The housing 1 can be formed by resin molding using a slide mold for this purpose. Therefore, it is necessary to cover one end side of the base cylinder portion 21 with the case 3, but since the other end side is covered with the protective wall 22, it is not necessary to cover that portion with a cover or the like. Therefore, the housing 1 can be composed of two parts, the base 2 and the case, and it is possible to reduce the number of parts and the product cost.

Subsequently, with reference to FIGS. 12 to 19, the mounting structure of the sounding device S configured as described above will be described.

As shown in FIGS. 12 to 15, the sounding device S is arranged between the license plate 1000 on the front side of the vehicle and the front bumper 1010. The sounding device S is arranged on the back side of the license plate 1000, and as shown in FIGS. 12 and 16, when the sounding device S is covered by the license plate 1000 and the license plate 1000 is viewed from the front side of the vehicle. The sound generator S is invisible. Therefore, it is possible to prevent the design from being deteriorated by attaching the sounding device S.

As shown in FIGS. 17 and 18, a recess 1011 is formed in the front bumper 1010, and the recess 1011 is exposed in the state before the license plate 1000 is attached. For example, the front bumper 1010 is attached with a mounting portion 1012 of the license plate 1000 so as to protrude from the wall surface of the front bumper 1010 in a substantially rectangular shape. Then, the lower position of the substantially rectangular mounting portion 1012 is recessed to open the lower side, and the recess 1011 is formed in the front bumper 1010 at a position corresponding to the inside of the opening of the mounting portion 1012. The size of the recess 1011 is arbitrary, but the recessed dimension in the front-rear direction of the vehicle is smaller than the recessed dimension in the left-right direction and the vertical direction of the vehicle. However, when the sounding device S is attached to the bumper 1010, the dimensions of the recess 1011 are set so that the sounding device S fits in the recess 1011 and does not protrude from the mounting portion 1012. Therefore, the license plate 1000 can be attached to the attachment portion 1012 without the sounding device S interfering with each other. As described above, in the sounding device S, the vibration direction of the diaphragm 72 is set to the short direction, the thickness of the product is reduced, and the sound device S is thin. Therefore, regarding the dimension of the dent in the front-rear direction of the vehicle, It can be small.

As shown in FIGS. 16 and 18, a front grill 1010a is provided in a portion of the front bumper 1010 below the position where the sounding device S is attached. As shown in FIGS. 13, 15 and 19, the front end of the front grill 1010a of the vehicle is located inside the bottom surface of the recess 1011, that is, on the rear side of the vehicle. Therefore, there is no member facing the discharge hole 61 around the discharge hole 61, and the circumference of the discharge hole 61 is an open space.

When the portion of the front bumper 1010 outside the mounting portion 1012 is called the surface 1013, the recess 1011 is recessed in the rear of the vehicle from the surface 1013, and the mounting portion 1012 protrudes in front of the vehicle from the surface 1013. is there.

In this embodiment, the sounding device S is attached to the bottom portion 1011a of the recess 1011. Specifically, as shown in FIG. 13, the bottom portion 1011a is provided with a screw fastening portion 1014 in which a female screw hole 1014a is formed. Then, an L-shaped stay 1015 in which the fastening hole 1015a is formed is arranged in the bottom portion 1011a, and the stay 1015 is formed by inserting the bolt 1016 into the fastening hole 1015a and screwing it into the female screw hole 1014a of the screw fastening portion 1014. It is fixed.

On the other hand, as shown in FIGS. 17 and 18, fitting portions 28 for sandwiching the stay 1015 from both sides are formed on the vertical wall 23 on the side opposite to the discharge hole 61 in the housing 1 of the sounding device S. By press-fitting the stay 1015 into the fitting portion 28, the sounding device S is held by the stay 1015 without rattling.

Further, as shown in FIG. 14, an opening 1017 is formed in a portion of the front bumper 1010 extending from a portion forming the side surface 1011b of the recess 1011 to the bottom portion 1011a. The opening 1017 is formed at a position corresponding to the connector 29 of the sounding device S, and the connector 1020 and the wire harness 1021 on the vehicle side are pulled out from the back side of the front bumper 1010 through the opening 1017, and the connector 1020 and the connector 29 are drawn. Is connected to.

The mounting portion 1012 has a structure protruding from the surface 1013, and has a mounting surface 1012a whose tip portion is flat. The license plate 1000 is mounted so as to face the mounting surface 1012a. Specifically, the license plate 1000 has a rectangular shape, and mounting holes 1001 shown by broken lines in FIG. 13 are formed at both corners above the license plate 1000. Further, as shown in FIG. 17, a sheet metal nut 1012c having a female screw hole 1012b formed is provided at a position corresponding to the mounting hole 1001 in the mounting portion 1012. Then, the number plate 1000 is fixed to the mounting portion 1012 by inserting the bolt 1018 into the mounting hole 1001 and screwing it into the female screw hole 1012b of the mounting portion 1012.

As described above, the mounting structure of the sounding device S according to the present embodiment is configured. In this way, the recess 1011 is formed in the front bumper 1010 so that the sounding device S is arranged in the recess 1011. Then, the lower part of the recess 1011 is opened, and the sound emitting direction from the sound emitting hole 61 of the sounding device S is made to match the opening direction of the recess 1011. That is, in the direction of sound emission from the emission hole 61, the recess 1011 is opened to form a gap that serves as a sound passage. As a result, when the sound generator S makes a sound such as an approach notification sound, the sound emitted from the sound generator S is emitted through between the license plate 1000 and the bumper 1010 without being blocked by other members. It can be communicated to the surroundings.

For example, in the legal regulation of vehicle approach notification, the sound pressure level at the microphone position is set to a desired level by sounding from the sounding device S with the position 2 m away from the center of the front end on both sides of the front end of the vehicle as the microphone position. It is confirmed whether or not it has been reached. On the other hand, as in the present embodiment, the sound is emitted from one direction of the sounding device S, and the opening direction of the recess 1011 coincides with the sound emitting direction from the sound emitting hole 61 of the sounding device S. Since this is done, the sound emitted from the sounding device S is transmitted to the microphone without being attenuated so much.

Therefore, the sound pressure level at the microphone position can reach a desired level without making the output of the sounding device S too high. Therefore, in addition to being able to reduce the output of the sounding device S, it is also possible to further reduce the noise in the vehicle interior because sound is not produced from the sounding device S in various directions. Therefore, the noise in the vehicle interior can be further reduced, and the vehicle can be equipped with a sounding device mounting structure and a sounding device that can obtain a desired sound pressure level at a predetermined microphone position.

Further, since the sound generator S is configured to emit sound from one direction, it is not necessary to secure a space for a sound passage at a position adjacent to the protective wall 22 in the mounting space of the sound generator S, so that the bumper 1010 or the like Sound can be emitted satisfactorily even if the license plates 1000 are arranged adjacent to each other.

(Second Embodiment)
The second embodiment will be described. In this embodiment, the mounting position of the sounding device S is changed with respect to the first embodiment, and the other parts are the same as those in the first embodiment. Therefore, only the parts different from the first embodiment will be described.

The mounting structure of the sounding device S according to the present embodiment will be described with reference to FIGS. 20 to 28.

As shown in FIGS. 20 to 28, in the present embodiment, the license plate 1000 is attached to the bumper 1010 via a license plate bracket (hereinafter, simply referred to as a bracket) 1100, and the sound generator S is attached to the bracket 1100. Is installed. Since the license plate 1000 is attached to the bumper 1010 via the bracket 1100, the license plate S is hidden by the license plate 1000 so that the license plate S cannot be seen when the license plate 1000 is viewed from the front side of the vehicle. .. The mounting portion 1012 described in the first embodiment is not mounted on the bumper 1010, and the bracket 1100 plays the role of the mounting portion 1012.

The bracket 1100 has a mounting surface 1101 to which the license plate 1000 is mounted, and the outer shape of the mounting surface 1101 is substantially rectangular with the same dimensions as the license plate 1000.

As shown in FIG. 21, support portions 1102 having mounting holes 1102a are formed at both corners above the mounting surface 1101. Further, a screw fastening portion 1013b in which a female screw hole 1013a is formed is provided at a position corresponding to the mounting hole 1102a on the surface 1013 of the bumper 1010. Then, the bracket 1100 is fixed to the front bumper 1010 by inserting the bolt 1110 into the mounting hole 1102a of the support portion 1102 of the bracket 1100 and screwing it into the female screw hole 1013a of the screw fastening portion 1013b.

Further, as shown in FIGS. 25 and 26, a screw fastening portion 1105 having a female screw hole 1105a formed inside both support portions 1102 is formed in the bracket 1100. Then, the number plate 1000 is fixed to the bumper 1010 via the bracket 1100 by screwing the bolt 1018 into the female screw hole 1105a of the screw fastening portion 1105 while inserting the mounting hole 1001 formed in the license plate 1000.

As shown in FIGS. 26 to 28, the bracket 1100 includes a partition wall 1103 erected from the mounting surface 1101 toward the rear of the vehicle, and the tip shape of the partition wall 1103 is the surface 1013 in the substantially upper half of the bracket 1100. The shape corresponds to the surface shape. Therefore, when the bracket 1100 is attached to the bumper 1010 together with the license plate 1000, the tip of the partition wall 1103 is in contact with the surface 1013 without any gap, and can be attached without rattling. The lower half of the bracket 1100 attached to the bumper 1010 is located below the surface 1013, and the sounding device S can be arranged below the surface 1013.

Further, as shown in FIG. 28 and the like, the lower partition wall 1103a, which is a portion located below the partition wall 1103, is provided with a mounting portion 1104 for the sounding device S. The mounting portion 1104 has a structure in which it is erected in a rectangular shape upward from the lower partition wall 1103a, and one side of the mounting portion 1101 is formed by a mounting surface 1101. As shown in FIGS. 21 to 23, 26 and 27, the lower partition wall 1103a is formed with a downward opening 1103b opened in a rectangular shape inside the mounting portion 1104, and the opening 1103b is formed. The sound emitted by the sounding device S is emitted to the outside through the sound device S.

As shown in FIGS. 21 and 23, an overhanging portion 1104a is formed inside the mounting portion 1104 on three surfaces of the mounting portion 1104 other than the one surface formed by the mounting surface 1101. The 1103b is configured to be surrounded by the overhanging portion 1104a. The tip surface of the sounding device S, that is, the tip surface forming the discharge surface 62 on the protective wall 22, the standing wall 23, and the facing wall 27 is brought into contact with the overhanging portion 1104a. Further, as shown in FIGS. 21, 23 and 28, snap-fit 1104b is formed on three surfaces of the mounting portion 1104 other than the one formed by the mounting surface 1101, and the protective wall 22 of the sounding device S and the protective wall 22 and the sound device S are formed. Protrusions 22a and 23a are formed at the tip of the vertical wall 23.

Then, the sounding device S is fixed to the mounting portion 1104 by the engagement between the snap fit 1104b and the protrusions 22a and 23a. That is, when the sounding device S is inserted into the mounting portion 1104, the snap fit 1104b is expanded by the protrusions 22a and 23a. Further, when the tip surface of the sounding device S is brought into contact with the overhanging portion 1104a, the snap fit 1104b gets over the protrusions 22a and 23a, and the restoring force of the snap fit 1104b causes the snap fit 1104b and the protrusions 22a and 23a to come into contact with each other. Be engaged. As a result, the sounding device S is fixed to the mounting portion 1104.

Further, as shown in FIG. 23, the height of the mounting portion 1104 from the overhanging portion 1104a is smaller than the distance from the emission surface 62 to the connector 29 in the sounding device S, and the mounting portion 1104 and the connector 29 Is designed not to interfere. Then, the connector 29 is connected to the connector 1020 on the vehicle side above the mounting portion 1104.

As shown in FIG. 27, one surface of the mounting portion 1104 formed by the mounting surface 1101 is opened on the overhanging portion 1104a side, and the sounding device S is mounted on the tip surface side of the sounding device S. The structure is such that the portion 1104 is surrounded by three surfaces. As a result, the sounding device S can be easily inserted into the mounting portion 1104. Further, an opening 1017 is formed in the bumper 1010 at a position below the surface 1013 as shown in FIG. 25, and the vehicle-side connector 1020 and the wire harness 1021 are pulled out from the back side of the front bumper 1010 through the opening 1017. The connector 1020 and the connector 29 are connected to each other.

As described above, the mounting structure of the sounding device S according to the present embodiment is configured. In this way, the sounding device S is attached to the bracket 1100 arranged between the license plate 1000 and the front bumper 1010. A mounting portion 1104 is provided below the bracket 1100, and an opening 1103b is formed inside the mounting portion 1104 so that sound is emitted through the opening 1103b. Even in this way, when the sound generator S makes a sound such as an approach notification sound, the sound emitted from the sound generator S is not blocked by other members and is passed between the license plate 1000 and the bumper 1010. It can be released and transmitted to its surroundings. Therefore, the same effect as that of the first embodiment can be obtained.

(Third Embodiment)
The third embodiment will be described. Also in this embodiment, the mounting position of the sounding device S is changed with respect to the first embodiment, and the other parts are the same as those in the first embodiment. Therefore, only the parts different from the first embodiment will be described.

The mounting structure of the sounding device S according to the present embodiment will be described with reference to FIGS. 29 to 35.

As shown in FIGS. 29 to 35, in the present embodiment, the sounding device S is attached to the back surface of the bumper 1010 at a position corresponding to the license plate 1000. Since the sound generator S is arranged on the back surface of the license plate 1000, as shown in FIGS. 29 and 33, the sound generator S is hidden by the license plate 1000, and the sound is produced when the license plate 1000 is viewed from the front side of the vehicle. The vessel S cannot be seen. The mounting portion 1012 described in the first embodiment is attached to the bumper 1010, and the license plate 1000 is attached to the mounting portion 1012.

As shown in FIGS. 32 and 34, a support portion 1019 is provided on the back surface of the bumper 1010, and the sounding device S is fixed to the support portion 1019 via a stay 1015. Specifically, a female screw hole (not shown) is formed in the support portion 1019, and the bolt 1016 is inserted into the fastening hole of the stay 1015 (not shown) and screwed into the female screw hole of the support portion 1019. S is fixed. In the case of the present embodiment, the support portions 1019 are provided at two locations, the stay 1015 is also provided with fastening holes at two locations, and the stay 1015 is attached to the bumper 1010 by using two bolts 1016. It is designed to be point-supported. The sounding device S is provided with a fitting portion 28, and one end of the stay 1015 is press-fitted into the fitting portion 28 from the direction opposite to that of the first embodiment, that is, from the direction from the front to the rear of the vehicle. , The sounding device S is held in the stay 1015 without rattling.

As shown in FIGS. 30 to 32 and 35, a downward opening 1013c is formed at a position below the surface 1013 of the bumper 1010, that is, a position of the surface 1013 corresponding to the sound generator S, and the opening is formed. Sound can be emitted through 1013c. In the case of the present embodiment, the opening 1013c has a size larger than the tip surface of the sounding device S, that is, the tip surface constituting the discharge surface 62 on the protective wall 22, the standing wall 23, and the facing wall 27. Then, the tip surface of the sounding device S is inserted into the opening 1013c.

In the case of the present embodiment, since the sounding device S is provided on the back surface of the bumper 1010, the connector 29 is connected to the connector 1020 on the vehicle side on the back surface thereof.

As described above, the mounting structure of the sounding device S according to the present embodiment is configured. As described above, the sounding device S is provided on the back surface of the bumper 1010 on the back surface of the license plate 1000. The position of the bumper 1010 corresponding to the emission surface 62 of the sounding device S is the opening 1013c. Even in this way, when the sound generator S makes a sound such as an approach notification sound, the sound emitted from the sound generator S is emitted from the back surface side of the license plate 1000 without being blocked by other members. It can be communicated to the surroundings. Therefore, the same effect as that of the first embodiment can be obtained.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims.

For example, the configuration of the sounding device S used in each of the above embodiments is given as an example, with the axis in the vibration direction centered on the sounding body 7 as the central axis and one direction in the circumferential direction around the central axis. The configuration of the sounding device S may be any as long as the sound is emitted only from.

Further, in the first and third embodiments, the sounding device S is fixed to the bumper 1010 via the stay 1015, and in the second embodiment, the sounding device S is used for the mounting portion 1104 of the bracket 1100 by using the snap fit 1104b. Was fixed. However, these fixed structures are only shown as an example, and other fixed structures such as the base cylinder portion 21 of the sounding device S are provided with an overhanging portion for attachment, and a bolt is attached to the overhanging portion. It may be used and directly fixed to an attachment target such as a bumper 1010. Further, the sounding device S may be directly attached to the attachment target and fixed by using an adhesive or the like. That is, a structure capable of emitting sound from the discharge hole 61 of the sounding device S without being blocked, for example, in the first embodiment, the lower part of the recess 1011 is opened, and in the second embodiment, inside the mounting portion 1104. Any fixed structure may be used as long as the opening 1103b is formed, the opening 1013c is formed in the third embodiment, and sound can be emitted through the opening 1013c.

However, the shape of the recess 1011 and the shapes of the opening 1103b and the opening 1013c are arbitrary, and may be other shapes. For example, taking the third embodiment as an example, as shown in FIG. 36, the opening 1013c may be divided into a plurality of portions instead of being larger than the emission surface 62 of the sounding device S. Also in the third embodiment, the emission surface 62 of the sounding device S does not have to be in the state of being inserted into the opening 1013c, but when the opening 1013c is divided into a plurality as shown in FIG. , The emission surface 62 of the sounding device S is in a state where it does not enter the opening 1013c. Of course, also in the second embodiment, the opening 1103b does not have to be rectangular, and may be divided into a plurality of openings as in FIG. 36.

Further, in the third embodiment, when the sound generator S is not allowed to enter the opening 1013c, the sound generator S may be in contact with the back surface of the bumper 1010, or a sound passage duct may be provided between the sound generator S and the bumper 1010. A cushioning material that functions as a function can also be arranged. In that case, the cushion material is formed into a frame shape corresponding to the discharge hole 61 so that the cushion material is sandwiched between the discharge surface 62 of the sounding device S and the bumper 1010. With such a structure, it is possible to further suppress sound leakage from the sounding device S into the bumper 1010. Since the cushion material applied here is intended to function as a sound passage duct for preventing sound leakage, it is composed of a cushion material as long as the purpose can be achieved. It is not necessary, and may be made of, for example, rubber or resin.

1 ... housing, 2 ... base, 3 ... case, 7 ... sounding body, 21 ... base cylinder, 22 ... protective wall, 23 ... standing wall, 24 ... partition, 27 ... facing wall, 28 ... fitting part, 29 ... Connector, 61 ... Discharge hole, 62 ... Discharge surface, 1000 ... Number plate, 1010 ... Front bumper, 1010a ... Front grill, 1011 ... Recess, 1011a ... Bottom, 1011b ... Side surface, 1012 ... Mounting part, 1012a ... Mounting surface, 1013 ... Surface, 1013a ... Female screw hole, 1013b ... Screw fastening part, 1013c ... Opening, 1014 ... Screw fastening part, 1014a ... Female screw hole, 1015 ... Stay, 1015a ... Fastening hole, 1016 ... Bolt, 1017 ... Opening, 1018 ... Bolt, 1019 ... Support, 1020 ... Connector, 1021 ... Wire harness, 1100 ... Bracket, 1101 ... Mounting surface, 1102 ... Support, 1102a ... Mounting hole, 1103 ... Bulk partition, 1103a ... Lower partition, 1103b ... Opening, 1104 ... Mounting part, 1104a ... Overhanging part, 1104b ... Snap fit, 1105 ... Screw fastening part, 1105a ... Female screw hole, 1110 ... Bolt, S ... Sound device

Claims (14)

It is a structure in which a sounding device that produces sound by vibrating the diaphragm (72) is attached to the vehicle.
The sounding device has a emission hole (61) for emitting sound, and the sound emission direction in which the sound is emitted from the emission hole is unidirectional, and the sound emission direction is downward. , The mounting of the sounding device, which is mounted between the front license plate (1000) and the front bumper (1010) in the vehicle or on the back side of the front bumper, and the lower part of the discharge hole in the sounding device is an open space. Construction. A recess (1011) having an opening at the bottom is formed at a position of the front bumper where the license plate is attached.
The mounting structure for a sounding device according to claim 1, wherein the sounding device is mounted in the recess so that the sounding device is mounted between the license plate and the front bumper. An opening (1017) from which the connector (1020) and the wire harness (1021) are pulled out is formed in the recess in the front bumper, and the connector on the vehicle side pulled out through the opening is said. The mounting structure for a sounding device according to claim 2, which is connected to a connector (29) provided on the sounding device. A claim that the sounding device has a diaphragm whose vibration direction is directed to the front-rear direction of the vehicle, and a dimension of the recess in the front-rear direction of the vehicle is larger than a dimension in the same direction of the sound device. The mounting structure of the sounding device according to 2 or 3. The front bumper has a front grill (1010a) below the position where the sounding device is attached, and the end of the front grill on the front end side of the vehicle is on the rear side of the vehicle from the bottom surface of the recess. The mounting structure of the sounding device according to any one of claims 2 to 4, which is located in. A bracket (1100) for attaching the license plate to the front bumper is provided between the front bumper and the license plate.
The mounting structure for a sounding device according to claim 1, wherein the sounding device is mounted on the bracket so that the sounding device is mounted between the license plate and the front bumper. The bracket is provided from a mounting surface (1101), a partition wall (1103) erected from the mounting surface toward the rear of the vehicle, and a lower wall surface (1103a) which is a lower portion of the partition wall. It has a mounting portion (1104) which is erected upward and has an opening (1103b) in which the lower wall surface is opened inside.
The mounting structure for a sounding device according to claim 6, wherein the sounding device is arranged in the mounting portion with the discharge hole facing the opening. The mounting portion has an overhanging portion (1104a) overhanging inside the mounting portion and also includes a snap fit (1104b).
The sounding device has protrusions (22a, 23a) at the tips of the walls (22, 23, 27) forming the discharge holes, and one surface formed by the tips of the walls forming the discharge holes is a discharge surface (22a, 23a). 62) The seventh aspect of the invention, wherein the discharge surface is brought into contact with the overhanging portion, and the protruding portion is fixed to the mounting portion by engaging with the snap fit. Sounding device mounting structure. The front bumper is formed with an opening (1017) from which a connector (1020) and a wire harness (1021) are pulled out from the vehicle side, and the vehicle-side connector pulled out through the opening is provided in the sounding device. It is connected to the connector (29)
The mounting structure of the sounding device according to claim 8, wherein the height of the mounting portion from the overhanging portion is smaller than the distance from the discharging surface of the sounding device to the connector provided on the sounding device. .. The sounding device is fixed to the back surface of the front bumper.
The attachment of the sounding device according to claim 1, wherein the front bumper has a downward opening (1013c) formed below the sounding device, and the sounding device is arranged so that the discharge hole faces the opening. Construction. The mounting structure of the sounding device according to claim 10, wherein the sounding device is inserted into the opening. The mounting structure for a sounding device according to claim 10, wherein a frame-shaped sound passage duct corresponding to the discharge hole is arranged between the tip of the sounding device and the front bumper. The mounting structure of the sounding device according to any one of claims 1 to 12, wherein the sounding device is covered by the license plate when viewed from the front of the vehicle. A vehicle to which the sounding device is attached by the attachment structure according to any one of claims 1 to 13.

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