JP2001103588A - Sound equipment - Google Patents

Abstract

(57) [Problem] To provide an opening portion of a duct by a bass reflex system on a rear portion of a cabinet and prevent this opening portion from being closed by a wall surface or the like. SOLUTION: Openings 24A, 24B of bass reflex type ducts 22A, 22B are arranged on a back surface 10C of a cabinet 10 in which a CD player and a speaker device are built. These openings 24A, 24B form left-right symmetric inclined surfaces 32, 34 on the rear surface 10C of the cabinet 10, and are provided in the inclined surfaces 32, 34. The inclined surfaces 32 and 34 are inclined so as to gradually protrude to the rear of the cabinet 10 toward the left and right ends of the cabinet 10, and the outermost portions 32 </ b> A and 34 </ b> A protrude rearward of the cabinet 10. Is done. Therefore, even when the acoustic device is installed along a wall or the like, the openings 24A and 24B are separated from the wall surface and arranged without being closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio equipment having a bass reflex type speaker device in a cabinet constituting a device main body, and having an opening of a duct of the speaker device provided on a rear portion of the cabinet.

[0002]

2. Description of the Related Art In a loudspeaker device used in a conventional audio apparatus, the sound pressure emitted from the rear surface of a vibrating body such as a cone speaker is inverted in phase by passing it through a bass reflex type duct, and is guided forward to form a vibrating body. A bass reflex system is known which increases the overall sound pressure by applying a sound pressure in phase with the sound pressure from the front of the device. However, for example, in portable audio equipment, since many functions need to be housed in a compact cabinet, there is no internal space for providing the above-described bass reflex duct from the rear to the front of the speaker. In some cases, there is no space for providing a duct opening at the front of the cabinet. Therefore, a configuration in which such a duct is provided at the rear of the cabinet has been proposed.

[0003]

However, when the opening of the duct of the bass reflex type is provided on the back of the cabinet as described above, the user of the acoustic device arranges the acoustic device along the wall surface. In this case, the wall surface is arranged in close contact with the rear surface of the cabinet, and the opening of the duct is closed by the wall surface, which causes a problem of deteriorating sound quality. Therefore, as an acoustic device in which the opening of the duct provided on the rear portion of the cabinet is not blocked by the wall surface, for example, Japanese Utility Model Laid-Open No. 2-101688.
As disclosed in Japanese Unexamined Patent Application Publication No. H11-260, there is known an apparatus in which an opening portion of a duct is arranged in a concave portion provided in a rear portion of a cabinet. However, in such a structure of the cabinet, since the opening of the duct is not closed by the wall surface using the top plate and the side plate of the cabinet, the shape of the entire cabinet is restricted, and the appearance is impaired. .

Accordingly, an object of the present invention is to provide a bass reflex type duct opening on the back side of a cabinet without deteriorating the aesthetics of the audio equipment, and to provide a duct opening such as a wall surface depending on the arrangement of the audio equipment. It is an object of the present invention to provide an audio device capable of reliably preventing the sound device from being blocked by the sound device.

[0005]

In order to achieve the above-mentioned object, an acoustic device according to the present invention has a speaker device adopting a bass reflex system in a cabinet constituting a device body, and a bass reflex type duct of the speaker device. In an acoustic device having an opening provided on a back portion of the cabinet, a projection protruding rearward of the cabinet is provided around an opening of the duct on a back portion of the cabinet.

In the acoustic device of the present invention, when the opening of the duct of the bass reflex type is provided on the back of the cabinet, the opening is provided with a projection projecting rearward of the cabinet. In such a case, even if the rear part of the cabinet is installed along a wall, for example, the projections will come into contact with the wall surface, and the opening of the duct will be arranged with a certain distance from the wall surface Is done. For this reason, the opening of the duct is not blocked by the wall surface, it is possible to exhibit an appropriate acoustic effect, and it is possible to contribute to the improvement of the sound quality of the acoustic device.

[0007] Therefore, in the acoustic device of the present invention, the necessity of providing the opening of the duct by the bass reflex system on the front of the cabinet is eliminated, so that the space for disposing the members on the front of the cabinet can be increased, and the degree of freedom in design can be improved. In addition to improving the aesthetics of the front of the cabinet and preventing the blockage of the duct opening at the back of the cabinet, the protrusions are formed on a part of the backside of the cabinet that significantly changes the shape to prevent this blockage. What you need to do is improve your aesthetics. As a result, it is possible to easily provide an audio device having excellent sound quality and aesthetic appearance as a whole.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an audio equipment according to the present invention will be described below. FIG. 1 is a plan view showing an appearance of a portable stereo device as an example of an audio device according to an embodiment of the present invention, and FIG. 2 is a rear view showing an appearance of the portable stereo device shown in FIG. .
The portable stereo apparatus of the present embodiment includes a tape recorder for recording and reproducing a tone signal on a tape cassette, a CD player for reproducing a tone signal on a compact disc (CD), and an FM / A radio receiving device for receiving an AM broadcast,
Left and right speaker devices are built-in.

An opening / closing lid 12 for accommodating a tape cassette in a tape recorder and removing the tape cassette from the tape recorder is provided on an upper surface portion 10A of the cabinet 10.
Is provided. Also, the upper surface 1 of the cabinet 10
0A is provided with an opening / closing lid 14 for accommodating a CD in the CD player and taking out the CD from the CD player. These opening / closing lids 12 and 14 are provided adjacent to each other. Also, the upper surface 10 of the cabinet 10
A group of various input keys 16 for instructing the operation of the tape recorder is provided in a portion located in front of the opening / closing lid 12 of A. A rod antenna 18 for a radio receiver is provided at the rear of the upper surface 10A of the cabinet 10.
Is provided so as to be freely foldable.

A front panel 10B of the cabinet 10 is provided with a group of input keys for a CD player or a radio receiver, an LCD display for displaying the status of the apparatus, and the like. The description is omitted because it is not directly related to. Also, the front portion 10B of the cabinet 10
The sound emitting sections 20A, 2A,
0B is provided.

The speaker device provided in the portable stereo device of this embodiment employs a bass reflex system, and has openings 24A, 24B of bass reflex type ducts 22A, 22B led from the rear surface of the vibrator of the speaker. Are arranged on the back of the cabinet 10. That is,
Of the pair of openings 22A and 24B, the left opening 24
A is guided from the left speaker device in the cabinet 10, and the right opening 24B is the cabinet 1
It is derived from the speaker device on the right side in 0. These openings 24A and 24B emit sound pressure from the rear surface of the speaker vibrator, in addition to the sound pressure emitted from the front portion 10B of the speaker vibrator to the sound emitting units 20A and 20B. This realizes an increase in sound pressure as a whole.

The rear portion 10C of the cabinet 10 in the portable stereo apparatus of this embodiment is connected to the rear portion 1C.
The inclined surfaces 32 and 34 are formed on the left and right sides of the main surface 30 constituting the main area of 0C, and the openings 24A and 24B of the left and right ducts 22A and 22B are arranged on the inclined surfaces 32 and 34. . That is, in this example, the main surface 30 of the back surface 10C of the cabinet 10 is formed in a flat surface shape substantially along the vertical direction, and is formed in the center of the back surface 10C of the cabinet 10 in a horizontally long rectangular shape. I have. The main surface 30 is provided with an opening / closing lid 36 for opening / closing a storage section such as a cable cord.

The inclined surfaces 32 and 34 are formed in a symmetrical shape with respect to each other, and are formed in a substantially semicircular region that is continuous with the left and right sides of the main surface 30. These inclined surfaces 32 and 34 are inclined so as to gradually protrude to the rear of the cabinet 10 in a direction away from the main surface 30, that is, toward the left and right ends of the cabinet 10, and the outermost portions 32 </ b> A and 34 </ b> A It is arranged to protrude to the rear of the cabinet 10. The openings 24A and 24B of the ducts 22A and 22B are opened in semi-circular shapes similar to the inclined surfaces 32 and 34, respectively, and are formed in the inclined surfaces 32 and 34, respectively. ing.

In the acoustic device of the present embodiment as described above, the openings 24A, 24A of the ducts 22A, 22B of the bass reflex type are used.
In the case where 24B is provided on the rear surface 10C of the cabinet 10, the openings 24A and 24B are provided at the rear of the cabinet 10 with the inclined surface 32 projecting horizontally at a constant inclination angle,
34, the rearwardly protruding portions 32A, 34A of the inclined surfaces 32, 34, even when the rear portion 10C of the cabinet 10 is installed along a wall or the like, for example, when installing the acoustic device. Comes into contact with the wall surface, and the openings 24A and 24B of the ducts 22A and 22B are arranged at a predetermined distance from the wall surface. For this reason, the duct 22 provided on the inclined surfaces 32, 34
The openings 24A and 24B of the A and 22B are arranged at positions spaced apart from each other at a fixed interval on the wall surface, so that the wall surfaces are not blocked, and an appropriate acoustic effect can be exhibited. It can contribute to the improvement of the sound quality of the device.

In this embodiment, the inclined surfaces 32, 34
By disposing the openings 24A, 24B of the ducts 22A, 22B in the cabinet, the ducts 22
It is not necessary to provide a clear protrusion for preventing the openings 24A and 24B of the holes A and 22B from being blocked by the wall surface.
It is also advantageous in terms of aesthetics. Therefore, in the acoustic device of the present embodiment, the ducts 22A, 22A of the bass reflex type are used.
Eliminating the necessity of providing the openings 24A and 24B of B in the front of the cabinet can increase the space for arranging members on the front of the cabinet, improve the degree of freedom in design, improve the aesthetic appearance of the front of the cabinet, and improve the rear of the cabinet. With regard to, while the openings 24A and 24B of the ducts 22A and 22B can be reliably prevented from being blocked,
This has the effect of improving the appearance. As a result, it is possible to easily provide an audio device having excellent sound quality and aesthetic appearance as a whole.

In the above description, the inclined surface 32,
34 is inclined horizontally with respect to the main surface 30 of the rear surface 10C of the cabinet 10, but here the main surface 3
0 does not necessarily indicate a flat surface in the vertical direction. That is, in the present invention, as a convenient concept for defining the inclined surfaces 32 and 34, the cabinet 10
This cabinet 1 is formed substantially along the left-right direction.
0 is installed along a wall or the like.
A surface that can be a reference for making the back surface portion 10C along a wall surface or the like is a main surface in a broad sense. Therefore,
The main surface may be, for example, a surface having a constant curvature, and even if there is no surface corresponding to the rear surface portion 10C of the cabinet 10, it defines the inclination direction of the inclined surfaces 32, 34. The term "main surface" is used in a virtual sense to perform the operation.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above example, and various modifications are possible. For example, in the above-described example, the inclined surfaces 32 and 34 are provided as the projections.
In other words, a projection protruding rearward of the cabinet may be provided around the openings 24A and 24B.
Moreover, you may make it combine the above-mentioned inclined surface and the protrusion part which protruded in the convex shape. Further, in the above-described example, an example in which a pair of speaker devices is provided has been described, but the present invention can be similarly applied to an audio device provided with one speaker device. Further, in the above-described example, an audio device equipped with a CD player and a cassette tape recorder has been described as an example, but an audio device using another recording medium (optical disk, magneto-optical disk, magnetic disk, memory card, or the like) is also described. It is equally applicable.

[0018]

As described above, according to the present invention, a speaker device adopting a bass reflex system is provided in a cabinet constituting a main body of the apparatus, and an opening of a duct of the speaker device is provided on a rear portion of the cabinet. In the acoustic device, a projection protruding rearward of the cabinet is provided around an opening of the duct on a rear portion of the cabinet.

For this reason, when installing the audio equipment, even when the rear surface of the cabinet is installed along a wall or the like, the projection comes into contact with the wall surface, and the opening of the duct faces the wall surface. Are placed at a fixed distance apart from each other, so that the opening of the duct is not blocked by the wall,
An appropriate sound effect can be exhibited, which can contribute to improvement in sound quality of the sound device. Therefore, according to the audio equipment of the present invention, by eliminating the need to provide the opening of the duct by the bass reflex method on the front of the cabinet, the space for disposing the members on the front of the cabinet can be increased, and the degree of freedom of design can be improved. If you can improve the aesthetics of the front, and reliably prevent the rear of the cabinet from blocking the duct opening, and if you form a protrusion on the part that significantly changes the shape of the rear of the cabinet to prevent this blocking, Since it is good, there is an effect that the beauty can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing the appearance of a portable stereo device as an example of an audio device according to an embodiment of the present invention.

FIG. 2 is a rear view showing the appearance of the portable stereo device shown in FIG.

[Explanation of symbols]

10 cabinet 10A top surface 10B
Front part, 10C ... Back part, 12, 14, 36 ... Open / close lid, 16 ... Various input key groups, 18 ... Rod antenna, 20A, 20B ... Sound emitting part, 22A, 22B ... Duct, 24A , 24B ... opening, 30 ... main surface, 3
2, 34 ... Slope.

Claims (10)

[Claims] A speaker device adopting a bass reflex system is provided in a cabinet constituting a device main body,
In an acoustic device in which an opening of a bass reflex type duct of the speaker device is provided on a back portion of the cabinet, a projection protruding rearward of the cabinet is provided around an opening of the duct on a back portion of the cabinet. An audio device characterized by the above. 2. The projection is an inclined surface having a fixed inclination angle with respect to a main surface constituting the rear surface of the cabinet, and at least a main portion of the inclined surface is larger than the main surface of the cabinet. The acoustic device according to claim 1, wherein the duct is an inclined surface disposed behind the opening, and the opening of the duct is disposed in the inclined surface. 3. A cabinet having a pair of left and right speaker devices in the cabinet, a pair of left and right symmetrical inclined surfaces on a rear surface of the cabinet, and an opening of a duct of the left speaker device is formed on a left inclined surface. 3. The acoustic device according to claim 2, wherein the opening of the duct of the right speaker device is arranged on the right inclined surface. 4. The acoustic device according to claim 2, wherein the inclined surface has a constant inclination angle in a horizontal direction. 5. An audio reproducing apparatus which accommodates a recording medium on which an audio signal is recorded in the cabinet and reproduces the recording medium.
The described audio equipment. 6. The audio device according to claim 5, wherein the recording medium is an optical disk medium. 7. The audio apparatus according to claim 1, further comprising an audio recording / reproducing device that accommodates a recording medium for recording an audio signal in the cabinet and performs recording and reproduction on the recording medium. 8. The audio device according to claim 7, wherein the recording medium is a magnetic medium. 9. The audio device according to claim 1, further comprising a radio receiving device in the cabinet. 10. The cabinet according to claim 1, wherein said cabinet is of a portable type.
The described audio equipment.