JP3959321B2 - Bass reflex type speaker and method of fixing bass reflex type speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bass reflex type speaker.
[0002]
[Prior art]
Bass reflex type speakers that are compact and can secure a wide reproduction sound range are used. In particular, since space saving is required for in-vehicle use, it is effective to use a bass reflex type speaker as a speaker of an audio / visual device or a navigation device. However, various devices (display devices, audio image devices, etc.) provided in the vehicle interior including these are increasing, and each device is required to be further reduced in outer dimensions. In addition, in the case of in-vehicle use, it is necessary to fix the speaker more firmly than in home use so that the speaker does not come off from the vehicle body due to vibration of the vehicle, etc., and the structure for this attachment also prevents the speaker from being downsized. It was.
[0003]
In addition, the speaker box is formed by assembling and fixing a plurality of box components because of problems in molding. For this reason, it is necessary to provide screw holes and screw guide holes for fixing the assembly, which has been an obstacle to downsizing.
[0004]
[Problems to be solved by the invention]
The present invention solves such a problem, and an object thereof is to realize a compact bass reflex type speaker.
[0005]
[Means for Solving the Problems]
In the bass reflex type speaker, a screw hole for screwing the bass reflex type speaker to the fixed portion is provided in a portion that can be seen from the open end of the cylindrical portion constituting the bass reflex port, and the cylindrical portion guides the screw to the screw hole. A guide hole is formed.
[0006]
In the bass reflex type speaker in which the speaker box is configured by assembling and fixing a plurality of box constituent members,
A screw hole for assembling and fixing the plurality of box constituent members to each other is provided at the bottom of the cylindrical portion constituting the bass reflex port, and a screw is inserted into the cylindrical portion and screwed into the screw hole. The plurality of box constituent members are assembled and fixed to each other.
[0007]
In addition, a sound emitting hole is provided on a side surface of the tubular portion, and the open end portion of the tubular portion is covered with a blindfold plate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an in-vehicle bass reflex speaker according to an embodiment of the present invention will be described. FIG. 1 is a structural diagram showing the structure of an in-vehicle bass reflex speaker according to an embodiment of the present invention. A is a front view and B is a cross-sectional view.
[0009]
Reference numeral 10 denotes a case for forming a speaker box, which is formed of a resin or the like in the shape of a substantially elliptic cylinder with a hollow 11 inside. A speaker unit 2 is fixed to the front opening of the case 10 with screws or the like. Reference numeral 3 denotes a speaker net provided on the front surface of the speaker unit 2 to protect the speaker unit 2, and is fixed to the case 10 (or the speaker unit 2) with a screw or a fitting structure.
[0010]
Reference numeral 5 denotes a screw guide hole for inserting a screw for attachment to the vehicle formed from the front surface of the case 10 toward the bottom, and the screw hole 4 is formed at the bottom of the screw guide hole 5. It should be noted that the screw guide hole 5 and the cavity 11 are spatially blocked, that is, no hole or the like is provided on the wall surface that separates the two spaces. 7 is a bass reflex cylinder part that forms a bass reflex port formed from the front surface of the case 10 toward the bottom, and the cavity 11 is connected to the external space via the bass reflex cylinder part 7 (the bottom part of the bass reflex cylinder part 7). These screw holes 8 are sealed with screws 12 when fixed to the vehicle). The bass reflex cylinder 7 and the screw guide hole 5 are integrally formed with the case 10 and resin. In this example, the case 10 is described as an integral shape for the sake of simplicity. However, in actuality, the case is molded with two bodies, such as a front part and a rear part, in relation to a mold, and the like. These are connected using a screw, an adhesive, or the like.
[0011]
In this example, the bass reflex tube portion 7 is linear, but it may be bent. In this case, the portion that can be seen from the front opening of the bass reflex tube portion 7, that is, the first bent portion from the opening. Becomes the bottom. Further, when the bass reflex tube portion 7 is bent, the tube portion is extended linearly from the front opening (becomes branched from the original bass reflex tube portion 7), and the tip of the tube tip is the bottom. Is possible.
Next, a method for fixing the bass reflex type speaker to the vehicle will be described. First, the bass reflex type speaker is temporarily placed at an installation location (here, the dashboard 1) in the vehicle. At this time, it may be temporarily fixed using a double-sided tape. Next, the screw 13 is inserted into the screw guide hole 5, and the screw 13 is tightened into the dashboard 1 through the screw hole 4. Further, the screw 12 is inserted into the bass reflex cylinder portion 7, and the screw 12 is tightened into the dashboard 1 through the screw hole 8. As a result, the bass reflex type speaker is firmly fixed to the dashboard 1 by the screws 12 and 13.
[0012]
With such a configuration, according to the bass reflex type speaker according to the present embodiment, the screw guide hole for inserting the screw for fixing to the vehicle body is constituted by the cylindrical portion 7 constituting the bass reflex port. The number of screw guide holes can be reduced. Therefore, the space for providing the screw guide holes can be reduced, and the bass reflex speaker can be miniaturized.
Next, a bass reflex speaker according to a second embodiment of the present invention will be described. FIG. 2 is a structural view showing the structure of the bass reflex type speaker according to the embodiment of the present invention, wherein (A) is a front view (B) is a cross-sectional view.
[0013]
Reference numeral 14 denotes a case front component that forms the front portion of the bass reflex type speaker. Reference numeral 15 denotes a case rear part constituting the rear part of the bass reflex type speaker. The case front component 14 and the case rear component 15 are assembled and fixed with screws to form a single speaker box. The speaker box is formed of a resin or the like in the shape of a substantially elliptical column or a quadrangular column with a hollow 16 inside. Reference numeral 2 denotes a speaker unit, which is fixed to the front opening of the integrated case with screws or the like. Reference numeral 3 denotes a speaker net provided on the front surface of the speaker unit to protect the speaker unit, and is fixed to the case (case front constituent member 14 in the present embodiment) or the speaker unit with screws or a fitting structure.
[0014]
Reference numeral 18 denotes a screw guide hole for inserting an assembly fixing screw, which is formed from the front surface of the case front component 14 toward the bottom. A screw hole 17 is formed at the bottom of the screw guide hole 18. . The screw guide hole 18 and the cavity 16 are spatially blocked, that is, no wall or the like is provided on the wall surface separating the two spaces. Reference numeral 20 denotes a bass reflex cylinder part that forms a bass reflex port formed from the front surface of the case front surface constituting member 14 toward the bottom, and the cavity 16 is connected to the external space via the bass reflex cylinder part 20. A screw hole 19 is formed at the bottom of the bass reflex cylinder 20. Further, the screw guide hole 18 and the bass reflex cylinder portion 20 are integrally formed with the case front component 14 and resin. In the state where the case rear component member 15 is assembled and fixed to the case front component member 14, all the portions corresponding to the positions of the screw hole 17 at the bottom of the screw guide hole 18 and the screw hole 19 at the bottom of the bass reflex cylinder portion 20 are provided. A recess 23 and a recess 24 are formed for screwing the screw tightened through the screw hole 17 and the screw hole 19.
In this embodiment as well, the bass reflex cylinder 20 is linear, but may be bent. In that case, the first bent portion from the opening becomes the bottom. Further, when the bass reflex tube portion 20 is bent, it can be branched from the original bass reflex tube portion 19, and a configuration in which the tube portion is linearly extended from the front opening and the tip thereof is the bottom is also possible.
Next, a method for mounting and fixing the bass reflex type speaker will be described.
[0015]
First, the assembly fixing surface of the case rear component member 15 is set to the front side, and is temporarily placed on a work table here. Next, the case front component member 14 is placed on the case rear component member 15 with the front side facing up. At this time, the screw hole 17 and the screw hole 19 are positioned so as to overlap the concave portion 23 and the concave portion 24 of the case rear component member 15. At this time, it may be temporarily fixed using a double-sided tape or the like. Then, the screw 26 is inserted into the screw guide hole 18 and the screw 27 is inserted into the bass reflex cylinder portion 19, and the screw 26 and the screw 27 are further inserted into the screw hole 17 and the screw hole 19 by screwing or the like. Then, the screw 26 and the screw 27 are tightened into the recess 23 and the recess 24 of the case rear component 15, respectively, and the case front component 14 and the case rear component 15 are fixed by the screw 26 and screw 27.
[0016]
With such a configuration, according to the bass reflex type loudspeaker according to the present embodiment, the screw guide hole for assembling and fixing is configured (combined) with the bass reflex cylinder portion 20 constituting the bass reflex port. The number can be reduced. Therefore, the space for providing the screw guide holes can be saved, and the bass reflex type speaker can be miniaturized.
Next, a bass reflex speaker according to a third embodiment of the present invention will be described. 3A and 3B are configuration diagrams showing a third embodiment of the present invention, in which FIG. 3A is a front view and FIG. 3B is a cross-sectional view. In addition, the same code | symbol is attached | subjected about the structure similar to embodiment of FIG. 2, and description is abbreviate | omitted.
[0017]
A screw guide hole blind plate 21 covers the open end of the screw guide hole 18. Reference numeral 22 denotes a bass reflex cylinder part blindfold covering the front open end of the bass reflex cylinder part 20. The screw guide hole blind plate 21 has a front plate having a size (wide) sufficient to cover the front shape of the screw guide hole 18 and a fixing plug that is in close contact with and fixed to the side wall of the screw guide hole 18 with resin or the like. Molded. The bass reflex cylinder part blind plate 22 is integrally formed with a front plate having a sufficient width to cover the front shape of the bass reflex cylinder part 20 and a fixing stopper that is in close contact with and fixed to the side wall of the bass reflex cylinder part 20. Reference numeral 25 denotes a sound emitting hole that extends slightly from the middle side wall of the bass reflex cylinder portion 20 and communicates with the outside from the side surface of the speaker box. Accordingly, the front open end portion of the bass reflex tube portion 20 is closed by the bass reflex tube portion blind plate 22, but the cavity 16 in the speaker box is connected to the outside air through the bass reflex tube portion 20 and the sound emission hole 25. The bass reflex effect is produced by the holes 25. The side wall of the sound emission hole 25 has a structure that is not connected by any part other than the internal cavity 16 and the bass reflex cylinder portion 20. In the present embodiment, the sound emitting hole 25 is straight and horizontal, but it may be a curved line, and there may be an embodiment in which the sound emitting hole 25 is inclined toward the front or bottom of the speaker box.
[0018]
FIG. 3 shows an example of a bass reflex type speaker constructed by assembling a plurality of constituent members, but the same can be realized in the structure of a bass reflex type speaker fixed to a vehicle as shown in FIG.
[0019]
The bass reflex speaker of this embodiment is assembled in substantially the same manner as in the second embodiment. Finally, the screw guide hole blind plate 21 and the bass reflex cylinder part blind plate 22 are respectively connected to the screw guide hole 18 and the bass reflex cylinder part 20. The point of press fitting is different. Note that it is conceivable that a sealing plate for sealing the sound emitting hole 25 is detachably provided for a user who does not cover the bass reflex cylinder portion 20 with the bass reflex cylinder portion blind plate 22.
[0020]
With such a configuration, the bass reflex port on the front face of the bass reflex speaker and the hole for screwing can be closed, so that foreign matter enters the bass reflex cylinder portion 20 to impede reproduction sound quality, and dust or the like enters the screw induction hole 18. It is avoided that it accumulates and becomes dirty, and a clean design (front) is realized.
[0021]
A screw guide hole and a screw hole may be provided from the rear surface of the case rear component 15 toward the case front component 14 and a recess may be provided in the case front component 14. In this case, the screw guide hole and the screw hole are provided on the front surface of the speaker. The hole-like open end portion is only the bass reflex cylinder portion 20, and the blindfold plate 22 is press-fitted only in this hole.
[0022]
【The invention's effect】
As explained in detail above, according to the bass reflex type speaker according to the present invention,
Since the screws for fixing or assembling are screwed using the bass reflex port, the space for providing the screw guide holes can be reduced, and the bass reflex speaker can be miniaturized.
[Brief description of the drawings]
FIG. 1 is a structural diagram showing the structure of an in-vehicle bass reflex speaker according to an embodiment of the present invention. FIG. 2 is a structural diagram showing the structure of a bass reflex speaker according to a second embodiment of the present invention. Structural drawing showing the structure of a bass reflex speaker according to the third embodiment of the invention
DESCRIPTION OF SYMBOLS 1 ... Dashboard 2 ... Speaker unit 4,8 ... Screw hole 5 ... Screw guide hole 7 ... Bass reflex cylinder part 10 ... Case 12 , 13 ··· Screw 14 ··· Case front component 15 · · · Case rear component 21 and 22 · · Blindfold 25 · · · Sound release hole

Claims (3)

In bass reflex type speaker,
A screw hole for screwing the bass reflex type speaker to the fixed portion is provided in a portion visible from the open end of the cylindrical portion constituting the bass reflex port, and the cylindrical portion forms a guide hole for guiding the screw to the screw hole. A bass reflex type speaker characterized by this.   The bass-reflex speaker according to claim 1, wherein the fixed portion is a vehicle. A sound emitting hole provided on a side surface of the cylindrical portion;
The bass-reflex speaker according to claim 1 or 2, further comprising a blindfold covering the open end of the tube portion.

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