JP6026911B2 - Interior for vehicle and grill frame for speaker - Google Patents

Description

  The present invention relates to a vehicle interior provided with a speaker grill that covers a sound output surface of a vehicle-mounted speaker, and a grille frame that holds the speaker grill.

  For example, a sedan vehicle is known in which a rear shelf (vehicle interior) is provided between a rear seat and a rear glass, and a speaker grill is provided on the rear shelf (see Patent Document 1, etc.). Speaker holes are formed in the rear shelf. The sound output surface of an in-vehicle speaker such as a woofer faces the speaker hole. The speaker grill has a net shape, for example. The speaker grille is attached to the speaker hole so as to cover the sound output surface. An annular grill frame is provided on the peripheral edge of the speaker hole in the rear shelf. The periphery of the speaker grille is held by this grille frame. The grill frame is known to be integrated with the rear shelf or separated from the rear shelf.

JP 2005-67257 A

When the grill frame is integrated with the rear shelf, it is necessary to change the specifications of the entire rear shelf according to the specifications such as the shape and size of the speaker grill, which increases costs and is complicated from the viewpoint of production management. .
On the other hand, when the grill frame is separate from the rear shelf, it is not always necessary to change the specifications of the rear shelf even if the specifications of the speaker grill are different. However, when the vehicle-mounted speaker is operated, vibration noise such as a cracking sound is likely to be generated between the rear shelf and the grill frame.
As a countermeasure, a structure in which the rear shelf has a multilayer structure of two or more layers and the surface layer is made of a soft material is known. However, it is disadvantageous in terms of cost to make the entire rear shelf a multilayer structure.

Therefore, it is also conceivable to sandwich a vibration absorbing member such as a nonwoven fabric between the rear shelf and the grill frame. However, if it does so, the vibration absorbing member such as a non-woven fabric is exposed to the passenger compartment, so that the appearance is poor.
Although it is conceivable to provide a gap between the rear shelf and the grill frame, the gap is visible from the passenger compartment, so that the appearance is also poor.

  In view of the above circumstances, in the interior structure such as a rear shelf with a speaker grill in a vehicle, the present invention suppresses an increase in cost and does not impair the appearance, and generates vibration sound such as a cracking sound. Preventing it is a problem to be solved.

In order to solve the above-mentioned problems, the present invention provides a vehicle interior provided with a speaker grill, wherein the interior body having a speaker hole and the interior body are separate from each other and has a holding portion for the speaker grill. And an annular grill frame provided at the periphery of the speaker hole, wherein the grill frame is a relatively hard and annular core layer, and a relatively soft and annular core layer covering the front side surface of the core layer. The inner surface of the core layer is laminated integrally, and the back surface of the core layer facing the interior body (excluding each surface of the connection protrusion when the core layer has connection protrusions as described later) At least the outer peripheral side part of the outer peripheral side part on the outer side in the radial direction of the surface layer and the inner peripheral side part on the inner side in the radial direction of the surface layer protrudes from the main body to the inner main body side than the back surface. Be in contact with And a feature.
The present invention also provides a grille frame for holding a speaker grill provided in an interior body of a vehicle interior, which is a relatively hard and annular core layer and a relatively soft and covering the front side surface of the core layer. An annular surface layer is integrally laminated, and the core layer has a back surface that should be opposed to the front side surface of the interior body, and has a radially outer peripheral side portion and a radially inner side surface of the surface layer. Another feature is that at least the outer peripheral side portion of the inner peripheral side portion protrudes in the facing direction from the back surface.
According to the present invention, the soft surface layer of the grill frame is in contact with the interior main body, and the hard core layer is disposed away from the interior main body, so that the vibration caused by the speaker sound is generated between the interior main body and the grill frame. Generation of vibration noise such as sound can be prevented. Further, even if the specifications such as the shape and size of the speaker or the speaker grill are different, it is not always necessary to change the specification of the entire vehicle interior, and the increase in cost can be suppressed. Furthermore, at least the outer peripheral side portion of the outer peripheral side portion and the inner peripheral side portion of the surface layer can be applied to the interior body, thereby avoiding the appearance of a gap between the interior body and the grill frame. The appearance of the vehicle interior can be secured. In addition, since it is not necessary to separately interpose a vibration absorbing member such as a nonwoven fabric between the grill frame and the interior main body, it is possible to avoid the appearance from being impaired and to avoid the increase in the number of parts.

  The outer peripheral side portion protrudes toward the interior main body from the outer peripheral edge of the back surface and contacts the interior main body, and the inner peripheral side portion protrudes toward the interior main body from the inner peripheral edge of the back surface. It is preferable to be in contact with the interior body. As a result, the grill frame can be stabilized, and as a result, the speaker grill can be stably held.

  A mounting hole is formed in a peripheral portion of the speaker hole in the interior body, and a connecting convex portion protruding from the back surface is integrally provided on the core layer, and the connecting convex portion is passed through the mounting hole. It is preferable to be connected to the interior main body so as not to be displaced. As a result, the grill frame can be firmly attached to the interior body. And generation | occurrence | production of vibration sounds, such as a crack sound, can be prevented reliably. Examples of the connecting means between the connecting convex portion and the interior main body include welding.

  It is preferable that a tensile stress acts on the connecting convex portion. By pulling the connecting convex portion, at least the outer peripheral side portion of the outer peripheral side portion and inner peripheral side portion of the surface layer can be strongly pressed and brought into close contact with the interior body. As a result, vibration noise such as a cracking sound can be reliably prevented, and a gap in appearance can be reliably avoided between the interior body and the grille frame, and appearance can be reliably prevented from being impaired. By laminating the core layer and the surface layer integrally, the core layer and the surface layer can be prevented from being peeled off by the tensile stress, and the outer peripheral side portion can be reliably pressed against the interior body.

  It is preferable that the thickness of the outer peripheral side portion becomes smaller toward the interior main body side. Thereby, when the tensile stress is acting on the said connection convex part, the pressing pressure to the interior main body of the outer peripheral side part of a surface layer can be made high. Therefore, the outer peripheral side portion can be reliably brought into close contact with the interior main body, and vibration sound such as a cracking sound can be reliably prevented, and appearance can be further reliably prevented from being impaired.

  Advantageous Effects of Invention According to the present invention, in an interior structure with a speaker grill in a vehicle, it is possible to prevent generation of vibration sound such as a cracking sound caused by speaker sound while suppressing an increase in cost and not impairing appearance. Can do.

FIG. 1 shows a first embodiment of the present invention and is a side view of a vehicle. FIG. 2 is a longitudinal sectional view of a rear speaker mounting portion of the rear shelf of the vehicle. FIG. 3 is a perspective view of a part of the rear shelf. FIG. 4 is a perspective view of a speaker grill and a grill frame provided on the rear shelf. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, showing the grill frame in a state before being attached to the rear shelf. 6 is a cross-sectional view of the grill frame and the speaker grille attached to the rear shelf as seen from the same cross section as FIG. FIG. 7 is a cross-sectional view of the grill frame and the speaker grill attached to the rear shelf as viewed along the line VII-VII in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a sedan type vehicle 1. A rear shelf 10 (vehicle interior) is provided between the rear seat 2 and the rear glass 3 of the vehicle 1. As shown in FIG. 2, the rear shelf 10 includes a rear shelf body 11 (interior body) and a grill frame 30. A speaker hole 12 is formed in the rear shelf body 11. A vehicle-mounted speaker 20 such as a woofer is disposed on the back side of the rear shelf body 11 (on the opposite side to the side facing the vehicle compartment 1a, the lower side). The speaker 20 is attached to the vehicle body 4. A sponge-like vibration absorbing material 5 is interposed between the periphery of the speaker 20 in the vehicle body 4 and the rear shelf body. The sound output surface 21 of the speaker 20 is directed upward and faces the speaker hole 12. A speaker grille 23 is attached to the speaker hole 12 so as to cover the sound output surface 21 from above. As shown in FIGS. 3 and 4, the speaker grille 23 is formed of a porous or net-like circular plate (for example, punching metal) and is separate from the speaker 20. In FIG. 4, illustration of many holes of the grill 23 is omitted.

The speaker grille 23 is attached to the rear shelf main body 11 as follows.
As shown in FIGS. 4 and 7, a plurality of locking convex pieces 24 are integrally provided on the cylindrical peripheral portion 23 c of the speaker grille 23. Each locking convex piece 24 protrudes downward from the peripheral edge portion 23c. A plurality of locking convex pieces 24 are arranged at intervals in the circumferential direction of the speaker grille 23.

  As shown in FIG. 2, a grill frame 30 is provided on the periphery of the speaker hole 12 on the upper surface of the rear shelf body 11 (the front side surface facing the passenger compartment 1 a). As shown in FIG. 4, the grill frame 30 has an annular shape along the periphery of the speaker hole 12 and is separate from the rear shelf main body 11. A holding portion 34 is integrally provided on the upper surface of the grill frame 30 (the front side surface facing the passenger compartment 1a). As shown in FIGS. 4 and 7, the holding part 34 includes a holding groove 34a and a plurality of holding holes 34b (only one is shown in FIG. 7). The holding groove 34 a extends annularly in the circumferential direction of the grill frame 30. Each holding hole 34 b extends from the bottom surface of the holding groove 34 a, penetrates the grill frame 30 in the thickness direction, and reaches the back surface 33 b of the grill frame 30. The plurality of holding holes 34 b are arranged at intervals in the circumferential direction of the grill frame 30. These holding holes 34b correspond to the locking projections 24 on a one-to-one basis. As shown in FIGS. 6 and 7, the peripheral portion 23c of the speaker grille 23 is accommodated in the holding groove 34a. Further, as shown in FIG. 7, the locking convex piece 24 is inserted into the corresponding holding hole 34b. The locking projection 24 is bent in an L shape inward in the radial direction (right in FIG. 7) at the intermediate portion in the vertical direction, and is hooked on the back surface 33 b of the grill frame 30. Thus, the speaker grille 23 is held on the grill frame 30.

The structure of the grill frame 30 will be described in detail.
As shown in FIG. 5, the grill frame 30 has a two-layer structure in which a core layer 31 and a surface layer 32 are integrally laminated. That is, the grill frame 30 is configured by molding the core layer 31 and the surface layer 32 in two colors. First, the core layer 31 may be formed, and then the surface layer 32 may be formed before the core layer 31 is cured. Conversely, the surface layer 32 is first formed, and then the core layer 31 is formed before the surface layer 32 is cured. You may shape | mold. The interface 30a between the core layer 31 and the surface layer 32 after the two-color molding is firmly integrated and cannot be peeled at least by a tensile stress described later.

  The core layer 31 is relatively hard, and the surface layer 32 is relatively soft. That is, when the hardness of the core layer 31 and the surface layer 32 is measured under the same conditions and the same method, the materials of the layers 31 and 32 are selected so that the hardness of the core layer 31> the hardness of the surface layer 32. Specifically, the core layer 31 is made of a hard resin such as polypropylene (PP). The surface layer 32 is made of a soft material such as an olefin-based thermoplastic elastomer (TPO). The material of the core layer 31 and the surface layer 32 is not limited to the above as long as the core layer 31 is relatively hard and the surface layer 32 is relatively soft. Due to the hard core layer 31, the shape retention strength of the grill frame 30 is sufficiently ensured. Further, the surface layer 32 preferably has elasticity or flexibility, and more preferably has vibration absorption capable of sufficiently absorbing vibration from the speaker 20.

  As shown in FIGS. 5 and 6, the core layer 31 integrally includes an annular core layer body 33 and a plurality of connecting convex portions 35. The core layer main body 33 is disposed above the rear shelf main body 11 (front side, vehicle compartment 1a side). The front side surface 33a of the core layer body 33 (the surface facing the passenger compartment 1a) includes a radially outer peripheral side surface 33e and a radially inner inner peripheral side surface 33f. The lower end edge of the outer peripheral surface 33e is continuous with the outer peripheral edge of the back surface 33b (the lower surface, the surface that should face the rear shelf main body 11) of the core layer main body 33. The lower end edge of the inner peripheral surface 33f is continuous with the inner peripheral edge of the back surface 33b. The rear surface 33b is not in contact with the rear shelf body 11, and is opposed to the rear shelf body 11 away from the rear shelf body 11 (upper side, that is, the vehicle interior 1a side).

  As shown in FIGS. 4 and 5, each connecting projection 35 is generally cylindrical in an initial state before being attached to the rear shelf body 11. The connecting projection 35 protrudes downward from the back surface 33 b of the core layer body 33. The plurality of connecting projections 35 are arranged at intervals in the circumferential direction of the core layer body 33. As shown in FIG. 6, a plurality of mounting holes 15 (only one is shown in FIG. 6) are formed at intervals in the circumferential direction around the speaker holes 12 in the rear shelf body 11. The attachment hole 15 corresponds to the connection convex part 35 one to one. Each connection convex part 35 is passed through the corresponding mounting hole 15 and connected to the rear shelf body 11 so as not to be displaced. Welding is adopted as a non-displaceable connecting means. That is, the front end portion (lower end portion) of the connecting convex portion 35 is welded to the rear shelf main body 11 so as to be crushed, and constitutes a welded portion 35a. A tensile stress acts on the connecting convex portion 35 in the axial direction (vertical direction) in the connected state.

  As shown in FIG. 5, the surface layer 32 has an annular shape with a substantially uniform thickness as a whole. The surface layer 32 has a cross-sectional shape that follows the shape of the front side surface 33a of the core layer main body 33, and includes a radially outer curved cylindrical outer side portion 32e and a radially inner cylindrical inner peripheral side portion 32f. Including. The front side surface of the surface layer 32 (the outer surface facing the passenger compartment 1a) is a decorative surface. This surface layer 32 covers the core layer body 33 and thus the front side surface 33a of the core layer 31, and covers the entire front side surface 33a. The outer peripheral side portion 32e covers the outer peripheral surface 33e. The inner peripheral side portion 32f covers the inner peripheral surface 33f.

  The peripheral side portions 32e and 32f of the surface layer 32 protrude below the back surface 33b of the core layer main body 33 (on the main body 11 side in the opposing direction of the back surface 33b and the rear shelf main body 11). That is, the outer peripheral side portion 32 e of the surface layer 32 protrudes downward (on the rear shelf main body 11 side) from the outer peripheral edge of the back surface 33 b of the core layer main body 33. The outer peripheral side portion 32e has a tapered shape that tapers in the protruding direction (downward) because the inner peripheral surface thereof is inclined. Therefore, the thickness and the cross-sectional area of the outer peripheral side portion 32e become smaller toward the lower side (rear shelf main body 11 side). An end surface (lower end surface) in the protruding direction of the outer peripheral side portion 32 e is in contact with the rear shelf body 11.

  The inner peripheral side portion 32 f of the surface layer 32 protrudes downward (on the rear shelf main body 11 side) from the inner peripheral edge of the back surface 33 b of the core layer main body 33. The end surface (lower end surface) in the protruding direction of the inner peripheral side portion 32 f is in contact with the rear shelf main body 11. The inner diameter of the inner peripheral side portion 32 f and thus the inner diameter of the grill frame 30 are slightly larger than the inner diameter of the speaker hole 12. The thickness of the inner peripheral side portion 32f is uniform as a whole. Therefore, the width of the lower end surface of the outer peripheral side portion 32e is larger than the width of the lower end surface of the inner peripheral side portion 32f, and the area of the lower end surface of the outer peripheral side portion 32e is the same as that of the lower end surface of the inner peripheral side portion 32f. It is smaller than the area.

A method of manufacturing the rear shelf 10 having the above configuration will be described.
As shown in FIG. 5, the grill frame 30 is manufactured by two-color molding. Thereby, the core layer 31 and the surface layer 32 are integrally formed.
A grill 23 is attached to the grill frame 30. That is, as shown in FIGS. 4 and 6, the peripheral edge portion 23c of the grill 23 is accommodated in the holding groove 34a, and each locking convex piece 24 is inserted into the holding hole 34b. As shown in FIG. 4, the locking protrusion 24 before insertion is substantially flat. As shown in FIG. 7, after the insertion, the front end of the locking projection 24 is bent into an L shape and hooked on the back surface 33 b of the grill frame 30.

  Next, the grill frame 30 is attached to the rear shelf body 11. That is, the grill frame 30 is disposed around the speaker hole 12 of the rear shelf main body 11 and the connecting convex portion 35 is inserted into the mounting hole 15. At this time, the rear shelf body 11 and the grill frame 30 are preferably turned upside down. That is, the rear shelf body 11 is on the upper side and the grill frame 30 is on the lower side. Then, the grill frame 30 is installed on the pedestal, and the rear shelf body 11 is pressed with a jig. As a result, a vertical compression force acts on the grill frame 30. (Note that the pedestal does not hit the grill 23. This prevents the compressive force from acting on the grill 23.) In this state, the front end of the connecting projection 35 is placed on the rear shelf main body 11. Weld. That is, the connecting projection 35 is connected to the rear shelf body 11 so as not to be displaced. After the welded portion 35a is cured, the jig is removed to release the compression. By this decompression, the surface layer 32 of the grill frame 30 mainly tries to return elastically. Due to this elastic force, the outer peripheral side portion 32 e and the inner peripheral side portion 32 f are strongly pressed against the rear shelf main body 11, and tensile stress acts on the connecting convex portion 35. Since the core layer 31 and the surface layer 32 are two-color molded and firmly integrated, it is possible to prevent the interface 30a from being peeled off by the tensile stress.

  In this way, the grill frame 30 is attached to the rear shelf body 11 in an inseparable manner. The outer peripheral side portion 32e and the inner peripheral side portion 32f of the grill frame 30 are both brought into contact with the rear shelf main body 11, whereby the grill frame 30 can be stabilized. As a result, the speaker grille 23 can be stably held by the grill frame 30.

  According to the rear shelf 10 having the above configuration, only the soft surface layer 32 of the core layer body 33 and the surface layer 32 of the grill frame 30 is in contact with the rear shelf body 11, and the hard core layer body 33 is the rear shelf body 11. Therefore, it is possible to prevent generation of vibration sound such as a cracking sound caused by the speaker sound from between the rear shelf main body 11 and the grill frame 30. In addition, vibrational noise can be more reliably prevented by pressing the peripheral side portions 32e and 32f strongly against the rear shelf body 11.

  Further, the speaker 20 and the speaker grille 23 having different specifications such as shape and size can be dealt with by changing the specification of the grill frame 30 exclusively, and it is not always necessary to change the specification of the rear shelf 10 as a whole. Absent. Therefore, an increase in manufacturing cost can be suppressed.

Further, the outer peripheral side portion 32e can be securely adhered to the rear shelf main body 11 by the tensile stress acting on the connecting convex portion 35, and a gap is formed between the outer peripheral side portion 32e and the rear shelf main body 11. Can be reliably prevented. Moreover, the contact pressure of the outer peripheral side portion 32e to the rear shelf main body 11 can be increased by making the outer peripheral side portion 32e tapered and reducing the area of the lower end surface thereof. Therefore, it is possible to reliably prevent a gap from being formed between the outer peripheral side portion 32e and the rear shelf main body 11. As a result, it is possible to reliably avoid the appearance gap between the grill frame 30 and the rear shelf main body 11, and to reliably prevent the appearance of the rear shelf 10 from being impaired.
On the other hand, the inner peripheral side portion 32f can be easily manufactured by making the entire thickness constant. Since the inner peripheral side portion 32f hardly appears in the appearance, even if the contact pressure between the inner peripheral side portion 32f and the rear shelf main body 11 is low, the appearance of the rear shelf 10 is not impaired.
Further, it is not necessary to intervene a vibration absorbing material such as a nonwoven fabric between the outer peripheral side portion 32e and the rear shelf main body 11 separately. Therefore, an increase in the number of parts can be avoided, and the appearance of the rear shelf 10 is not impaired since the vibration absorbing material does not appear in the appearance.
Furthermore, the beauty can be further improved by making the front side surface of the surface layer 32 a decorative surface.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.
For example, the vehicle interior to which the present invention is applied is not limited to the rear shelf as long as it has a speaker, and may be a door trim, an instrument panel, a rear water panel, or the like.
It suffices that at least the outer peripheral side portion 32 e of the outer peripheral side portion 32 e and the inner peripheral side portion 32 f of the surface layer 32 is in contact with the interior main body 11, and the inner peripheral side portion 32 f may be separated from the interior main body 11.

  A tensile stress may not be applied to the connecting convex portion 35. The peripheral side portions 32e and 32f of the surface layer 32 may not be compressed. Even in such a state, the connecting projection 35 is connected to the interior main body 11 so as not to be displaceable by welding or the like, so that it is possible to reliably prevent the generation of vibration noise such as a cracking sound. From the viewpoint of preventing vibration noise such as a cracking sound, the peripheral side portions 32e and 32f of the surface layer 32 are not in contact with the interior body 11 as long as the connection projection 35 is connected to the interior body 11 so as not to be displaced. May be.

The core layer 31 and the surface layer 32 of the grill frame 30 only need to be laminated so as to be integrated with each other, and are not limited to being integrated at the time of molding by two-color molding or the like, and after being molded separately, Etc. may be integrated.
The means for connecting the grill frame 30 to the interior body 11 is not limited to the welding of the connecting projection 35.
For example, a locking claw may be integrally provided on the grill frame 30 and may be hooked into a claw locking hole provided in the interior body 11. The “connecting convex portion” may be configured by the locking claw, and the “mounting hole” may be configured by the claw locking hole. A tensile stress may act on the locking claw in a state where the locking claw is hooked in the claw locking hole by adjusting the length of the locking claw.
The grill frame 30 and the interior main body 11 may be joined with screws or an adhesive.

  The present invention can be applied to, for example, a sedan type passenger car in which a speaker is provided on a rear shelf.

1 Vehicle 10 Rear shelf (vehicle interior)
11 Rear shelf body (interior body)
12 Speaker hole 15 Mounting hole 23 Speaker grill 30 Grill frame 31 Core layer 32 Surface layer 32e Outer peripheral side part 32f Inner peripheral side part 33b Back surface 34 Holding part 35 Connecting convex part 35a Welding part

Claims (5)

In vehicle interiors with speaker grills,
An interior body having speaker holes;
An annular grill frame that is separate from the interior body, has a holding portion for the speaker grill, and is provided at the periphery of the speaker hole;
The grill frame is integrally laminated with a relatively hard and annular core layer and a relatively soft and annular surface layer covering the front side surface of the core layer, The back surface facing the interior body is separated from the interior body to the front side, and at least the outer peripheral side portion of the outer peripheral side portion on the radial outer side and the inner peripheral side portion on the radial inner side of the surface layer is more than the inner surface. An interior for a vehicle, characterized in that it protrudes toward the body and is in contact with the interior body.   A mounting hole is formed in a peripheral portion of the speaker hole in the interior body, and a connecting convex portion protruding from the back surface is integrally provided on the core layer, and the connecting convex portion is passed through the mounting hole. The vehicle interior according to claim 1, wherein the vehicle interior is connected to the interior main body so as not to be displaced.   The vehicle interior according to claim 2, wherein a tensile stress acts on the connecting convex portion.   The interior of the vehicle according to any one of claims 1 to 3, wherein a thickness of the outer peripheral side portion is reduced toward the interior main body. A grille frame for holding a speaker grill provided in an interior body of a vehicle interior,
A relatively hard and annular core layer and a relatively soft and annular surface layer covering the front side surface of the core layer are integrally laminated, and the core layer is separated from the front side surface of the interior body. And at least the outer peripheral side portion of the outer peripheral side portion on the radially outer side and the inner peripheral side portion on the inner side in the radial direction of the surface layer protrudes in the opposing direction from the rear surface. A loudspeaker grille frame for vehicle interiors.

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