JPH08149587A - Speaker device - Google Patents

Abstract

PURPOSE: To provide the speaker device superiod in acoustic performance by controlling the shape of a grill aperture part set to the front of a speaker. CONSTITUTION: This device consists of a grill 1 formed into one body with resin, plural rectangular through holes 1a provided in this grill 1, cross ribs provided for through holes 1a, and the speaker whose front the grill 1 is coupled to. In the actual attaching state, rectangular through holes 1a provided in this grill 1 are inclined at, for example, about 60 deg. to the hearing point, and this angle is the constitution angle in the longer-side direction of rectangular through holes 1a. That is, the front of this grill 1 is provided with plural rectangular through holes 1a which are arranged such prescribed angle that their axial lines in the longer-side direction are directed to the hearing point in the attaching state. Consequently, sounds radiated from the speaker 2 are less degraded by the grill 1, and faithful and natural sounds can be reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker device which is mainly used as a vehicle among various audio equipments and has a grill for protecting the loudspeaker mounted on the front surface of the loudspeaker unit.

[0002]

2. Description of the Related Art A conventional speaker device of this type will be described with reference to the drawings.

FIGS. 7 (a) and 7 (b) are a front view and a side sectional view showing a conventional speaker device. In FIG. 7, reference numeral 9 denotes a resin-integrally molded grill which is joined to the front surface of the speaker 10. This grill 9 has an average wall thickness of 2.5 mm, and has a structure in which the through holes 9a are continuously formed in a grid pattern with ribs of 5.5 mm square and 2.5 mm.

Further, as shown in FIG. 8, a speaker 12 (not shown) mounted so as to be embedded in a door 11 of a vehicle has a grill 12 mounted on the front surface of the speaker device. The device was installed at an angle of about 60 ° with respect to the listening point 13 and used.

[0005]

However, the above-described conventional configuration has the following problems, and the speaker 1
It was difficult to satisfactorily transmit the acoustic characteristics radiated from 0.

That is, when the grill 9 mounted on the front surface of the speaker 10 is made of resin, it has a certain thickness (t2.5 to t3.5 mm in consideration of moldability), and a square hole or a round hole is formed therein. Has a structure in which through holes 9a are continuously opened in a grid pattern, and the mounting position of the grill 9 is at an angle with respect to the listening point 13 of the listener, and the mounting surface of the speaker 10 is 0 in the longitudinal axis
If the angle is °, the listener listens at a position having an angle of about 60 ° from the axis.

Therefore, even if the grill 9 is not provided, the directional characteristic is significantly deteriorated, and when the grill 9 is attached as described above, the opening ratio viewed from the direction of 60 ° is the meat of the grill 9. The thickness serves as a shielding portion which obstructs the opening of the grill 9 and becomes almost non-opening, and the sound pressure level and frequency characteristic pattern of the high frequency characteristic radiated from the speaker 10 and the frequency characteristic pattern of the middle frequency range. Was extremely deteriorated.

FIG. 9 shows the sound pressure frequency characteristics of 0 ° and 60 ° measured by mounting the conventional grill 9 on the front surface.
FIG. 10 shows sound pressure frequency characteristics of a so-called speaker 10 alone, which is measured without the grill 9 in the same speaker device, and the sound pressure frequency characteristics of both are summarized (Table 1). As is clear from the above, it can be confirmed that the acoustic characteristics of the grill 9 are significantly deteriorated.

[0009]

[Table 1]

[0010]

In order to solve this problem, the speaker device of the present invention has a plurality of speakers arranged at a predetermined angle so that the axis of the long side direction is directed to the listening point in the mounted state. The grill has a rectangular through hole on the front surface and a speaker having the grill on the front surface.

[0011]

With this configuration, the axes of the plurality of rectangular through-holes in the long-side direction face the listening point in the mounted state, so that the opening area when viewed from the listening point is increased and the shield is reduced, and the speaker is The acoustic characteristics radiated from the sound source are transmitted to the listening point without deterioration, the sound pressure level in the high frequency range is improved, the dip in the middle frequency range is improved, and the disturbance of the frequency characteristic can be eliminated.

[0012]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 (a) and 1 (b) are a front view and a side sectional view showing a speaker device according to the same embodiment, in which 1 is a grill integrally formed of resin, and 1a is this grill 1.
A plurality of rectangular through holes, 1b are lateral ribs provided in the through holes 1a, and 2 is a grill 1
A plurality of rectangular through holes 1a are provided in the grill 1 at an angle of about 60 ° with respect to a listening point 13 shown by reference numeral 13 in FIG. By setting this angle as the configuration angle in the long side direction of the rectangular through hole 1a in FIG. 1, the grille opening ratio viewed from the listening point 13 is shown in the conventional speaker device shown in FIG. Can be increased from 0% to 40%.

In this embodiment, the size of the rectangular through-hole 1a is 37 mm in the long side direction × 7 mm in the short side direction.
The rib thickness between the through holes 1a is 3 mm, and the lateral rib 1b also serving as an acoustic reflector is formed at an angle of 45 ° with respect to the listener's direction.

With this structure, the sound radiated from the speaker 2 is prevented from being deteriorated by the grill 1 as much as possible, and the natural sound can be reproduced. 0 for speaker device by example
The sound pressure frequency characteristics of ° and 60 ° are shown in Fig. 2, and the result of comparison with the conventional product is shown in (Table 2). It can be clearly seen that the characteristics in the high and middle ranges are improved. .

[0016]

[Table 2]

Further, FIGS. 3 (a) and 3 (b) are shown in FIG.
The horizontal rib 1b shown in (a) and (b) is shown in a direction perpendicular to the horizontal rib 1b. If the height of the horizontal rib 3b is set to 5 mm or less, the horizontal rib 1b shown in FIG. The effect is not so different, and the molding die for molding the grill 3 with resin is easy to process.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to the drawings.

FIGS. 4 (a) and 4 (b) are a front view and a side sectional view showing a speaker device according to the same embodiment. In FIG. 4, 4 is a grill and 4a are rectangles provided on the grill 4. The shaped through holes 4b are reflectors formed by forming a predetermined angle so that the inner wall in the long side direction of the through holes 4a faces the listening point, and 2 is a speaker in which the grill 4 is coupled to the front surface. A plurality of rectangular through holes 4a provided in the grill 4 are provided at an angle of about 60 ° with respect to a listening point 13 shown by reference numeral 13 in FIG. 2, the rectangular through hole 4a has a configuration angle in the short side direction, and the inner wall in the long side direction of the through hole 4a faces the listening point 13 at a predetermined angle of about 3
By configuring so as to be 0 °, the reinforcing rib also serves as the acoustic reflection plate 4b.

The sound emitted from the speaker 2 hits the reflection plate 4b by the reflection plate 4b, and the reflection angle becomes 30 ° with respect to the incident angle of 30 °, and the reflected sound goes in the direction of 60 ° with respect to the grill mounting surface. It will be emitted and the listening point 1
It is possible to realize a speaker device which is oriented in the direction of 3 and in which the disturbance of the frequency characteristics in the high frequency band and the middle frequency band is reduced and which reproduces excellent sound quality.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to the drawings.

FIGS. 5 (a) and 5 (b) are a front view and a side sectional view showing the speaker device according to the embodiment. In FIG. 5, a grill 5 and a plurality of 5a and 5b are provided on the grill 5. As shown in FIG. A rectangular through hole, 5c is a horizontal rib, 5d is a reflector, and 2 is a speaker in which the grill 5 is connected to the front surface.

The loudspeaker device of this embodiment having the above-described structure is similar to the grill 1 of the first embodiment except that the grill 5 has the same structure.
The upper half of the grill and the lower half of the grill 5 are combined with the grill 4 of the second embodiment.

The speaker device according to this embodiment also has the above first and second embodiments.
Similar to the second embodiment, rectangular through holes 5a and 5b are provided at an angle of about 60 ° with respect to a listening point 13 shown by reference numeral 13 in FIG. By setting this angle as the configuration angle in the long side direction of the rectangular through-hole 5a in the same figure, the upper half of the grill 5 has the opening ratio of the grill viewed from the listening point 13 as shown in FIG. Can be increased from 0% to 40%. Further, the lower half of the grill 5 is formed to have a configuration angle in the short side direction of the rectangular through hole 5b, and the inner wall 5 of the through hole 5b is configured to have a predetermined angle of about 30 ° so as to face the listening point 13, It is a reinforcing rib that also serves as the acoustic reflector 5d. The sound emitted from the speaker 2 by the reflector 5d hits the reflector 5d, and the reflection angle becomes 30 ° with respect to the incident angle of 30 °, and the reflected sound is emitted in the direction of 60 ° with respect to the grill mounting surface. This structure allows the sound emitted from the speaker 2 to be prevented from being deteriorated by the grill 5 as much as possible, and allows a natural sound to be reproduced. It is possible to realize a speaker device that reproduces excellent sound quality with less disturbance of the frequency characteristics in the middle range.

FIG. 6 shows the speaker device according to the present embodiment at 0 °.
And a sound pressure frequency characteristic of 60 ° are shown, and the result of comparison with the conventional product is shown in (Table 3). It is clearly recognized that the characteristics in the high range and the middle range are improved.

[0026]

[Table 3]

Although the present embodiment has been described as a speaker device for a car door, the angle of the grill opening is
By controlling the shape and size and the angle of the reflector, it can be used for all mounting conditions such as rear tray, instrument panel, roof, etc. Also, the larger the rectangular through-hole size, the greater the reflection. It is well known that the longer the plate size, the better. However, considering the protection of the speaker, which is the original function of the grill, it is desirable to determine the optimum size in consideration of the strength of the grill. Needless to say.

[0028]

As described above, the speaker device according to the present invention can provide a speaker device having excellent acoustic performance by controlling the shape of the grille opening mounted on the front surface of the speaker. The effects as described can be obtained.

1. The grille opening has a rectangular shape, and its long side is directed to the listening point, so that the sound pressure level in the high frequency range is prevented from being lowered, the disturbance of the frequency characteristic pattern in the middle frequency range is prevented, and a more natural sound is obtained. Acoustic performance can be secured.

2. The opening of the grill has a rectangular shape, and the direction of its short side is directed to the listening point, and the inner wall of the opening is provided with a predetermined angle so as to act as an acoustic reflector, so that the sound is heard at the listening point. It is possible to prevent the disturbance of the frequency characteristic pattern in the middle frequency band by reflection and improve the sound pressure level in the high frequency band.

3. With the structure of the grill combining the above 1 and 2, the sound pressure level in the high range is improved and
It is possible to provide a speaker device that is more natural and less deteriorates in acoustic performance by preventing the disturbance of the frequency characteristic pattern in the middle range.

[Brief description of drawings]

FIG. 1A is a front view showing a speaker device according to a first embodiment of the invention, and FIG. 1B is a side sectional view of the same.

FIG. 2 is a frequency characteristic diagram of the speaker device according to the embodiment.

FIG. 3A is a front view showing an application example of the speaker device according to the first embodiment of the present invention, and FIG.

FIG. 4A is a front view showing a speaker device according to a second embodiment of the invention, and FIG. 4B is a side sectional view of the same.

5A is a front view showing a speaker device according to a third embodiment of the present invention, and FIG. 5B is a side sectional view of the same.

FIG. 6 is a frequency characteristic diagram of a speaker device according to a third embodiment.

FIG. 7A is a front view showing a conventional speaker device, and FIG. 7B is a side sectional view of the same.

FIG. 8 is a perspective view showing how the speaker device is attached.

FIG. 9 is a frequency characteristic diagram of a conventional speaker device.

FIG. 10 is a frequency characteristic diagram of a conventional single speaker.

[Explanation of symbols]

 1,3,4,5 Grills 1a, 3a, 4a, 5a, 5b Through holes 1b, 3b, 5c Horizontal ribs 2 Speakers 4b, 5d Reflectors

Claims (3)

[Claims] 1. A grill having a plurality of rectangular through-holes on the front face, which are arranged at a predetermined angle so that an axis line in the long-side direction faces the listening point in an attached state, and the grill on the front face. A speaker device consisting of a mounted speaker. 2. A plurality of rectangular through-holes arranged at a predetermined angle so that the axis of the short-side direction faces the listening point in the mounted state, and the long-side direction of the through-hole is provided. A speaker device comprising a grill having a reflector formed by providing a predetermined angle so that the inner wall of the grill faces the listening point, and a speaker having the grill mounted on the front surface. 3. A rectangular through hole that is arranged at a predetermined angle so that the axis of the long side direction faces the listening point in the attached state, and the axis of the short side direction faces the listening point in the attached state. And a grille provided with a rectangular through hole on the front face, which is provided with a predetermined angle so that the inner wall in the long side direction is provided with a predetermined angle so that the inner wall in the long side direction faces the listening point, A speaker device consisting of a speaker with this grill attached to the front.