JP2006311076A - Structure for attaching on-vehicle speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attach a speaker etc., to a floor part of a vehicle or a member, which can constitute the floor part, such as a back door. <P>SOLUTION: This structure for attaching the on-vehicle speaker is formed in a container shape having an opening portion, and has a housing 30 whose bottom plate functions as a baffle plate for fixing the speaker 40 and a speaker grill 20 which is a cover member closing the opening portion of the housing 30 and has many sound radiation holes 26, the speaker 40 and housing 30 are embedded in the floor part of the vehicle or the member capable of constituting the floor part, and the speaker grill 20 has strength nearly as large as that of the floor material to be used as a portion of the floor part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mounting structure for an in-vehicle speaker installed in a vehicle.

Various types of mounting structures for the above-described in-vehicle speaker have been proposed.
For example, the in-vehicle speaker mounting structure described in Patent Document 1 is a structure in which the speaker 50 is attached to a door trim 59 as an interior material, as shown in FIGS. That is, a speaker grill 52 having a sound emission hole 52h is formed in a part of the door trim 59, and a surface member 54 having a central opening 54k is attached to the back side of the speaker grill 52 via a sealing material 53. A speaker 50 is attached to the back side of the surface member 54.
JP-A-10-210582

  However, since various members are housed inside the door trim 59 and the inner lining of the side panel, it is difficult to secure a sufficient space for the speaker 50. As a place where a sufficient space can be secured for the speaker 50, a floor portion of the passenger compartment, a back door that can constitute the floor portion, and the like are conceivable. However, according to the above-described conventional mounting structure of a vehicle-mounted speaker, the strength of the speaker grille 52 is low and it is difficult to use the speaker grille 52 as a flooring material for a passenger compartment. Further, since the countermeasures against the adhesion of foreign matters to the speaker 50 are insufficient, it is difficult to use the speaker 50 on the floor of the passenger compartment.

  The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to make it possible to install an in-vehicle speaker on a floor portion of a vehicle or a member that can constitute the floor portion. In other words, the range in which speakers can be attached is expanded.

The above-described problems are solved by the inventions of the claims.
The mounting structure of the in-vehicle speaker according to the invention of claim 1 is formed in a container shape having an opening, and a housing in which a bottom plate serves as a baffle plate for fixing the speaker, and a lid shape that closes the opening of the housing. A speaker grille having a number of sound emitting holes, and the speaker and the housing are embedded in a floor portion of a vehicle or a member that can constitute the floor portion. In order to be used as a part of the floor portion, the floor portion has substantially the same strength as the flooring material.

  According to the present invention, the speaker is fixed to a bottom plate of a container-like housing having an opening, and the opening of the housing is further closed by a speaker grill. For this reason, it is possible to prevent foreign matter from adhering to the surface of the speaker to some extent. In addition, since the speaker grill has almost the same strength as the flooring, it is not damaged even if a person steps on it or a load of luggage is applied. For this reason, it becomes possible to attach the said speaker etc. to the floor part of a vehicle, or the member which can comprise the said floor part, for example, a back door.

According to the second aspect of the present invention, the speaker is a speaker for a low frequency range, and the arrangement of the sound emission holes is set so that the sound emission holes of the speaker grille are disengaged from positions facing the speakers. And
For this reason, when the speaker grill is used as a part of the floor, the speaker is not positioned directly below the sound emission hole of the speaker grill. Therefore, foreign matter that has entered through the sound emitting hole, such as water droplets or mud on the shoe sole, does not fall on the speaker. Thereby, it is possible to prevent malfunction of the speaker due to foreign matters adhering to the cone paper or the like.
In addition, since the speaker is a low-frequency speaker, the sound has no directivity, and the sound emission performance hardly deteriorates even if the sound emission hole is not located at the position facing the speaker.

According to the invention of claim 3, the bottom plate of the housing that functions as a baffle plate is formed with grooves on both sides of the speaker, and the grooves are disposed at positions facing the sound emission holes of the speaker grille, The speaker grill is configured to be inclined.
For this reason, when the speaker grill is used as a part of the floor portion, a groove is disposed immediately below the sound emission hole of the speaker grill. As a result, foreign matter that has entered from the sound emitting hole, for example, water droplets or mud on the shoe bottom, falls into the groove just below. In addition, since the groove is inclined, the foreign matter that has fallen into the groove is collected at the lowermost part, and is less likely to adhere to the speaker.

According to the invention of claim 4, the housing is characterized in that a drain hole is formed at a position corresponding to the lowest part of the groove.
For this reason, the foreign matter collected at the bottom of the groove is discharged out of the housing through the drain hole.
According to the invention of claim 5, the housing and the speaker grille are attached to a back door that constitutes a part of the floor portion in a fully opened state.
According to the invention of claim 6, the back door is in a fully closed state, and the drain hole of the housing is located at the lowermost part.
For this reason, even when the back door is fully closed, foreign matter on the groove can be discharged out of the housing.

  According to the present invention, since the speaker can be attached to the floor of the vehicle or a member that can constitute the floor, the range in which the speaker can be attached is expanded.

Hereinafter, an in-vehicle speaker mounting structure according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5.
The present embodiment relates to an in-vehicle speaker mounting structure that is mounted on a lower back door of a vehicle. Here, FIG. 1 is a perspective view showing the fully opened state of the lower back door having the in-vehicle speaker mounting structure according to the first embodiment, and FIG. 2 is a single perspective view of the lower back door. 3 is an exploded perspective view showing the in-vehicle speaker mounting structure, FIG. 4 is a longitudinal sectional view thereof, and FIG. 5 is a perspective view showing a housing used in the in-vehicle speaker mounting structure. In addition, the front and rear, right and left in a figure represent the front-back direction and left-right direction of a vehicle.

As shown in FIG. 1, the lower back door 2 having the in-vehicle speaker mounting structure according to the present embodiment is a door for opening and closing the rear opening 1 a of the vehicle 1 together with the upper back door 4. The lower back door 2 is attached to the lower part of the rear end of the vehicle 1 through a left and right hinge mechanism 3 (see FIG. 2) so as to be vertically rotatable. The inner side surface 2 f of the lower back door 2 is continuous with the floor surface 1 f of the vehicle 1. That is, in this state, as shown in FIG. 1, the lower back door 2 works as an overhang member of the floor portion of the vehicle 1, and a load can be placed on the inner side surface 2 f of the lower back door 2. Will be able to ride. Further, when the lower back door 2 rotates upward to the fully closed position (standing position) and is locked at this position, the inner side surface 2f of the lower back door 2 constitutes the rear wall surface of the passenger compartment. Become.
A vehicle-mounted speaker unit 10 is attached to substantially the center of the lower back door 2.

As shown in FIG. 3, the in-vehicle speaker unit 10 includes a speaker 40, a housing 30 that fixes the speaker 40, and a lid-like speaker grill 20 that closes an opening of the housing 30.
The speaker 40 is a speaker for a low sound range, and is formed in a state in which mounting seats 43 protrude radially outward at four locations on the periphery. Further, a bolt hole 43 h is formed in the center of the mounting seat 43.
As shown in FIGS. 3 to 5, the housing 30 for fixing the speaker 40 is formed in a square box shape with an open top by a front side wall 31 f, a rear side wall 31 b, a left side wall 31 h, a right side wall 31 r and a bottom plate 32. . The housing 30 is attached to the lower back door 2 with the front and rear side walls 31f and 31b positioned along the width direction of the vehicle 1 and the left and right side walls 31h and 31r positioned along the front and rear direction of the vehicle 1. It is done. For this reason, when the lower back door 2 is rotated upward to the fully closed position, the front side wall 31f of the housing 30 is positioned at the lowermost position, and the rear side wall 31b is positioned at the uppermost position. A structure for attaching the housing 30 to the lower back door 2 will be described later.

As shown in FIG. 4B, the bottom plate 32 of the housing 30 has an opening 32p for a speaker in the center. Further, a through hole 32 h is formed around the speaker opening 32 p so as to match the bolt hole 43 h of the mounting seat 43 of the speaker 40. Therefore, as shown in FIG. 4B, the speaker 40 is set in the opening 32p from the inside of the housing 30, and the bolt hole 43h of the mounting seat 43 of the speaker 40 and the through hole 32h of the housing 30 are used. The speaker 40 can be fixed to the housing 30 by bolt and nut connection.
That is, the bottom plate 32 of the housing 30 functions as a baffle plate for the speaker 40.

Further, as shown in FIGS. 4 and 5A, etc., grooves 32m are formed on both sides of the bottom plate 32 of the housing 30 with a speaker opening 32p interposed therebetween. The grooves 32m are for guiding foreign matter out of the housing 30, and the respective grooves 32m are formed along the left and right side walls 31h and 31r. Further, as shown in FIG. 5B, each groove 32m is inclined so as to become lower as it approaches the front side wall 31f. Further, a drain hole 33 is formed in the front side wall 31f of the housing 30 at a position corresponding to the lowermost portion of each groove 32m.
As shown in FIG. 3 and the like, support seats 34 having bolt holes 34a are provided outside the upper opening of the housing 30 in the vicinity of the four corners of the upper opening.
That is, the upper opening of the housing 30 corresponds to the opening of the housing in the present invention.

As shown in FIGS. 3 and 4, the lid-shaped speaker grill 20 is a plate-like member that closes the upper opening of the housing 30 and is also used as a flooring material of the vehicle 1. A mounting seat 24 is formed at a corresponding position. The speaker grill 20 is configured to close the upper opening of the housing 30 in a state where the mounting seat 24 is aligned with the support seat 34 of the housing 30. A bolt hole 24x having the same diameter as the bolt hole 34a of the support seat 34 is formed in the mounting seat 24 of the speaker grill 20, and a fixing bolt 36 (see FIG. 4B) is passed therethrough. .
A large number of sound emission holes 26 are formed in the speaker grill 20 at positions facing the respective grooves 32 m of the bottom plate 32 in the housing 30. The sound emission holes 26 are arranged in order in the direction in which the grooves 32m extend from end to end of the grooves 32m, and a plurality of rows of the sound emission holes 26 are arranged (three per mound 32m in the figure). Column) is formed. That is, the sound emission hole 26 is formed so as to be separated from the position facing the speaker 40.
The speaker grille 20 has a strength that can be used as a flooring material of the vehicle 1 and is formed, for example, by pressing a steel plate. Note that the speaker grill 20 can be die-cast using an aluminum alloy instead of a steel plate.

As shown in FIGS. 4A and 4B, the panel 2p of the lower back door 2 has a unit opening 2x at the mounting position of the in-vehicle speaker unit 10, and the unit opening 2x is formed at the periphery of the unit opening 2x. A flange portion 2y is provided. Thereby, in a state where the housing 30 is passed through the unit opening 2x in the panel 2p of the lower back door 2 (embedded state), the support seat 34 of the housing 30 is supported by the inner flange portion 2y of the panel 2p. It becomes like this. In addition, a bolt hole 2n having an equal diameter (see FIG. 4B) is formed in the inner flange portion 2y of the panel 2p of the lower back door 2 at a position corresponding to the bolt hole 34a of the support seat 34 of the housing 30. Has been.
With the above configuration, the bolt hole 34a of the support seat 34 of the housing 30 and the bolt hole 24x of the mounting seat 24 of the speaker grill 20 are overlapped with the bolt hole 2n of the panel 2p of the lower back door 2, and these bolts The in-vehicle speaker unit 10 is fixed to the lower back door 2 by passing the fixing bolts 36 through the holes 2n, 34a, 24x and tightening the nuts.
The surface of the panel 2p of the lower back door 2 is covered with a door trim 5 which is an interior material, and the mounting seat 24 and the like of the speaker grill 20 are covered with the inner periphery of the door trim 5. Furthermore, the surface 20 u of the speaker grill 20 is configured to be flush with the surface of the door trim 5 in a state where the in-vehicle speaker unit 10 is fixed to the lower back door 2.

Next, the operation of the in-vehicle speaker unit 10 according to this embodiment will be described.
In a state where the lower back door 2 is held in the fully closed position (standing position) and the speaker 40 is operating, the phonetic sound of the speaker 40 is as shown by the arrow in FIG. Sound is emitted from the 20 sound emitting holes 26 into the vehicle interior. Here, the sound emitting hole 26 of the speaker grill 20 is formed at a position away from the position facing the speaker 40. However, since the speaker 40 is a speaker for a low frequency range, the sound has no directivity and is emitted. The position of the hole 26 has little effect. Furthermore, since the back sound of the speaker 40 is blocked by the bottom plate 32 of the housing 30 that functions as a baffle plate, the sound is hardly emitted into the vehicle interior. For this reason, the sound flowing in the passenger compartment becomes clear.
Next, when the lower back door 2 is held in the fully open position and the inner side surface 2f of the lower back door 2 is continuous with the floor surface 1f of the vehicle 1 as shown in FIG. Is used as a part of the floor surface 1f.
In the in-vehicle speaker unit 10 according to the present embodiment, the speaker grill 20 is made of a steel plate or aluminum die-cast, and has almost the same strength as the flooring. Therefore, the speaker grill 20 is damaged even if a person steps on it or a load of luggage is applied. There is nothing to do.

Further, the arrangement of the sound emission holes 26 is set so that the sound emission holes 26 of the speaker grill 20 are removed from the positions facing the speakers 40. For this reason, when the speaker grill 20 is used as a part of the floor portion, the speaker 40 is not located directly below the sound emission holes 26. Accordingly, foreign matter that has entered through the sound emission hole 26, such as water droplets or shoe mud, does not fall on the speaker 40 (see FIG. 4B). Thereby, the malfunction of the speaker 40 due to foreign matters adhering to the cone paper or the like can be prevented.
Further, a groove 32m is formed on both sides of the speaker 40 in the bottom plate 32 of the housing 30 that functions as a baffle plate, and the groove 32m is disposed at a position facing the sound emitting hole 26 of the speaker grill 20. For this reason, when the speaker grill 20 is used as a part of the floor portion, the groove 32m is disposed directly below the sound emission holes 26. As a result, foreign matter that has entered through the sound emission hole 26, such as water droplets or mud on the shoe sole, falls into the groove 32m directly below as shown in FIG. 4B. Furthermore, since the groove 32m is configured to be inclined, the foreign matter that has fallen into the groove 32m is collected at the lowermost portion of the groove 32m, and the foreign matter is less likely to adhere to the speaker 40.

Further, since the drain hole 33 is formed in the housing 30 at a position corresponding to the lowermost part of the groove 32m, the foreign matter dropped into the groove 32m is discharged out of the housing 30 from the drain hole 33.
In the state where the lower back door 2 is returned to the fully closed position (standing position), the drain hole 33 of the housing 30 is positioned at the lowermost position, so that the foreign matter dropped into the groove 32m Even when closed, it is discharged out of the housing 30 satisfactorily.
As described above, according to the mounting structure of the in-vehicle speaker unit 10 according to the present embodiment, the speaker 40 can be disposed on the floor of the vehicle 1, so that the mountable range of the speaker 40 is expanded.

In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in this embodiment, although the example which attaches the vehicle-mounted speaker unit 10 to the lower back door 2 was shown, it is also possible to attach to the floor part in a vehicle interior.
Moreover, although the example which forms the sound emission hole 26 of the speaker grille 20 in the shape of a through-hole was shown, it can also form in mesh shape, for example.
In addition, although an example in which the front side wall 31f, the rear side wall 31b, the left side wall 31h, the right side wall 31r, and the bottom plate 32 of the housing 30 are formed with substantially equal thickness dimensions has been shown, It is also possible to make it larger than the thickness dimension of 31f, 31b, 31h, 31r. As a result, the back sound blocking performance of the speaker 40 is improved.
Moreover, although the example which forms the housing 30 and the speaker grille 20 in a planar square shape was shown, the planar shapes of the housing 30 and the speaker grille 20 can be changed as appropriate.

It is a perspective view showing the full open state of a lower back door provided with the vehicle-mounted speaker attachment structure which concerns on Embodiment 1 of this invention. It is a perspective view of a lower back door. It is a disassembled perspective view showing a vehicle-mounted speaker mounting structure. It is a longitudinal cross-sectional view (A figure, B figure) showing a vehicle-mounted speaker attachment structure. They are a perspective view (A figure) of the housing used in a vehicle-mounted speaker mounting structure, and a BB arrow sectional drawing (B figure) of A figure. It is the whole perspective view (A figure) showing the conventional vehicle-mounted speaker attachment structure, and the longitudinal cross-sectional view (B figure) of a speaker part.

Explanation of symbols

1 Vehicle 2 Lower back door (member that can constitute the floor)
20 Speaker grill 26 Sound emission hole 30 Housing 32 Bottom plate 32 m Groove 33 Drain hole 40 Speaker

Claims (6)

A housing having an opening and a bottom plate serving as a baffle plate for fixing the speaker;
It is a lid-like member that closes the opening of the housing, and has a speaker grille with a number of sound emitting holes,
The speaker and the housing are embedded in a vehicle floor, or a member that can constitute the floor,
The in-vehicle speaker mounting structure, wherein the speaker grille has a strength substantially equal to a floor material so that the speaker grill can be used as a part of the floor portion. It is the mounting structure of the vehicle-mounted speaker according to claim 1,
The speaker is a speaker for a low frequency range,
The mounting structure of the in-vehicle speaker, wherein the arrangement of the sound emission holes is set so that the sound emission holes of the speaker grille are disengaged from a position facing the speaker. An in-vehicle speaker mounting structure according to claim 2,
Grooves are formed on both sides of the speaker on the bottom plate of the housing that serves as the baffle plate,
The in-vehicle speaker mounting structure is characterized in that the groove is disposed at a position facing the sound emitting hole of the speaker grill, and is further inclined with respect to the speaker grill. An in-vehicle speaker mounting structure according to claim 3,
A mounting structure for an on-vehicle speaker, wherein a drain hole is formed in the housing at a position corresponding to a lowermost portion of the groove. An in-vehicle speaker mounting structure according to any one of claims 1 to 4,
The mounting structure for a vehicle-mounted speaker, wherein the housing and the speaker grille are attached to a back door that constitutes a part of the floor portion in a fully opened state. An in-vehicle speaker mounting structure according to claim 5,
A mounting structure for an on-vehicle speaker, wherein the back door is in a fully closed state, and a drain hole of the housing is located at a lowermost part.

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