JP2623035B2 - Speaker device - Google Patents

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 particularly excellent in reproducing low-frequency sounds.

[0002]

2. Description of the Related Art Generally, a low-frequency speaker device is constructed by arranging a speaker inside a box-shaped cabinet which functions as a baffle. In particular, a bass reflex system shown in FIG. Kelton system shown in
A double bass reflex type speaker device shown in FIG.

In a bass reflex type speaker device, as shown in FIG. 13, a speaker (9) is attached to a first sound emission port (90) provided in a cabinet (91), and a speaker (9) is attached to a second sound emission port (98). Is formed by connecting a cylindrical port (92). In the device, the sound wave from the speaker (9) is radiated directly to the front of the cabinet (91) through the sound outlet (90),
Sound waves generated from the back of the speaker (9) toward the inside of the cabinet (91) are resonated at the port (92), and the sound output port (98)
The sound is indirectly radiated from and the sounds from both sound outlets (90) and (98) are synthesized to expand the low frequency range.

In the Kelton speaker system, the interior of a cabinet (91) is separated into a first chamber (94) and a second chamber (95) by a partition (93) as shown in FIG. The speaker (9) is attached to the second chamber (95) through the opening, and the port (92) is arranged in the second chamber (95). In this device, the amplitude of the speaker (9) at the resonance frequency can be suppressed, so that it is suitable as a large input type.
Since the direct sound wave from (9) and the sound wave resonated at the port portion (92) are mixed and radiated from the port portion (92), there is a disadvantage that distortion is increased.

In a double bass reflex type speaker device, as shown in FIG. 15, the inside of a cabinet (91) is divided into a first chamber (94) and a second chamber (95) by a partition wall (97). ), A speaker (9) is arranged outward, a first port (96) is connected to a partition (97), and a second port (95) is arranged in the second chamber (95). ) Is placed. According to this device, since the high-frequency component generated from the second port section (92) is cut, there is an advantage that the relationship with the mid-high range speaker can be improved.

[0006]

As described above, each of the three types of bass speaker has its advantages and disadvantages. For example, when the speaker is provided in a television receiver, it has to be balanced with the characteristics of the middle / treble speaker to be installed. , The most appropriate method was selected. However, as shown in FIGS. 13 to 15, the structures of the cabinets used in the respective systems are different from each other, so that a dedicated mold is required for each system for manufacturing the cabinet, and the manufacturing process is complicated. Was.

An object of the present invention is to provide a speaker device capable of realizing three systems of a bass reflex system, a Kelton system, and a double bass reflex system by using a cabinet having a common structure.

[0008]

In the speaker device according to the present invention, as shown in FIG. 1, a cabinet (2) has a main cabinet (21) and a sub-cabinet, both ends of which are open.
(22) and the port portion (23) are sequentially connected, and the whole is formed in a cylindrical shape, and the speakers (1) are provided outside the main cabinet portion (21) at both openings of the main cabinet portion (21). The speaker mounting portions (3) and (4) for mounting toward are provided.

[0009]

As shown in FIG. 1, a speaker (1) is mounted outward in an opening of a main cabinet (21) of a cabinet (2) opposite to a sub-cabinet (22).
The main cabinet part (21) and the sub cabinet part (22) are shown in FIG.
13 corresponds to the cabinet (91) and the port (23) is shown in FIG.
A bass reflex type speaker device is configured corresponding to the port section (92).

As shown in FIG. 2, the speaker (1) is attached to the opening of the cabinet (2) on the side of the sub cabinet (22) of the main cabinet (21), facing the sub cabinet (22). By closing the other opening of the main cabinet section (21), the main cabinet section (21) is moved to the first chamber in FIG.
(94) and the sub-cabinet part (22)
The second chamber (95) is formed, and the port section (23) corresponds to the port section (92) of FIG.

Further, as shown in FIG. 3, a speaker (1) is attached outward to an opening of the cabinet (2) opposite to the sub-cabinet section (22) of the main cabinet section (21). By attaching a drone cone (6) to the other opening of (21), the drone cone (6) is
The main cabinet part (21) forms the first chamber (94) in FIG. 15 and the sub-cabinet part (22) functions as the first chamber (94) in FIG. Two chambers (95) are formed, and the port (23) corresponds to the port (92) in FIG.
A speaker device of the double bass reflex type is configured.

[0012]

According to the speaker device of the present invention, three types of bass reflex system, Kelton system and double bass reflex system are available.
When manufacturing various types of speaker devices, since the structure of the cabinet used for each method is common, a dedicated mold for each method is not required for manufacturing the cabinet, thereby simplifying the manufacturing process. I can do it.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a speaker for heavy bass will be described with reference to the drawings. Speaker
(1) consists of a drive circuit built-in part (14) and a cone housing part (15) as shown in FIG. 4, and a plurality of flanges (11) project outward on the outer periphery of the cone housing part (15). And each flange (11)
Has a screw hole (12) for fixing. An annular packing (13) is attached to an outer peripheral portion of the front surface of the cone housing (15).

The cabinet (2) is made of synthetic resin,
As shown in FIG. 5, the main cabinet part (21), the sub-cabinet part (22) and the port part (23) are sequentially connected to form a tube, and the main cabinet part (21) and the sub-cabinet part (22) of the main cabinet part (21) are connected. Is the first sound outlet (26) and port (23) at the opposite rear end.
A second sound output port (27) is formed at the front end of.

The main cabinet part (21) is constructed by joining and integrating a rear cabinet half (24) and a front cabinet half (25) which are separate from each other. The cabinet section (22) and the port section (23) are integrally formed.

Each of the rear cabinet half (24) and the front cabinet half (25) is formed in the shape of a rectangular tube or a cylinder having an internal space capable of accommodating the speaker (1). The sub-cabinet section (22) is a cone accommodating section of the speaker (1).
It is formed in a cylindrical shape having substantially the same diameter as the outer diameter of (15). Further, the port portion (23) is formed in a cylindrical shape or a rectangular tube shape having a smaller diameter than the sub-cabinet portion (22).

FIG. 6 shows an example of a structure for integrating the rear cabinet half (24) and the front cabinet half (25), and a small-diameter annular member protruding from the rear cabinet half (24). The peripheral wall portion (24a) and the large-diameter annular peripheral wall portion (25b) protruding from the front cabinet half (25) are airtightly fitted to each other. It goes without saying that not only such a fitting structure but also fastening means such as bonding and screwing can be adopted.

As shown in FIG. 5, both ends of the main cabinet (21) are respectively provided with cone housings (15) of the speaker (1).
The cylindrical portions (31) and (41) having substantially the same diameter as the outer diameter of the speaker are provided, and speaker mounting portions (3) and (4) are formed in these cylindrical portions. FIG. 7 shows the configuration of the speaker mounting section (3) formed in the main cabinet section (21). In the main cabinet part (21), a plurality of bosses (31) are integrally formed around the cylindrical part (31), corresponding to the screw holes (12) of the flange (11) of the speaker (1), The screws (32) allow the flange (1) of the speaker (1) to be
1) is fixed to the boss (31) of the main cabinet part (21). The speaker mounting part of the front cabinet half (25)
(4) has the same configuration as the speaker mounting portion (3) of the rear cabinet half (24), and thus the description is omitted.

As shown in FIG. 1, when the speaker (1) is mounted outward on the speaker mounting portion (3) of the main cabinet (21), the main cabinet (21) and the sub-cabinet (2) are mounted.
The total volume of 2) corresponds to the volume of the cabinet (91) in FIG. 13 to constitute a bass reflex type speaker device. According to the speaker device, the sound pressure level of the port section (23) is as shown in FIG.
As shown in the figure, the distribution is substantially symmetric about the resonance frequency.

As shown in FIG. 2, the main cabinet (2
The speaker (1) is attached to the sub-cabinet section (22) in the speaker mounting section (4) of (1), and the sound emission opening (26) of the main cabinet section (21) is closed by the lid (5), so that the main The volume of the cabinet section (21) and the volume of the sub-cabinet section (22) correspond to the volume of the first chamber (94) and the volume of the second chamber (95) in FIG. Be composed. According to the speaker device, the sound pressure level of the port section (23) has a distribution extending from the resonance frequency to the higher frequency side as shown in FIG.

Further, as shown in FIG. 3, the main cabinet (21)
The speaker (1) is externally attached to the speaker mounting portion (3) of the main cabinet (21), and the drone cone (6) is attached to the opening of the speaker mounting portion (4) of the main cabinet (21). 21) Volume and sub cabinet unit
The volume of (22) is equal to the volume of the first chamber (94) in FIG.
A double bass reflex type speaker device is configured corresponding to the volume of 5). According to the speaker device, the sound pressure level of the port section (23) has a distribution in which the higher frequency side than the resonance frequency is suppressed as shown in FIG.

FIGS. 11 and 12 show an example in which the above-described speaker device is incorporated in a television receiver together with a treble speaker (7) and a middle-tone speaker (8) as a heavy bass speaker (10). I have. In this case, as shown in FIG. 11, the sound output port (27) provided in the port portion (23) of the heavy bass speaker (10) is opened in the front of the television cabinet. In addition, as shown in FIG. 12, a sound outlet (26) provided in the main cabinet (21) of the bass speaker (10) is opened at the back of the television cabinet.

As a result, the heavy bass speaker (10) is compactly accommodated in the television cabinet, and the space in the television cabinet can be effectively used.

The description of the above embodiments is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the appended claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example in which a bass-reflex type speaker device is configured according to the present invention.

FIG. 2 is a cross-sectional view illustrating an example in which a Kelton type speaker device is configured according to the present invention.

FIG. 3 is a cross-sectional view showing an example in which a double bass reflex type speaker device is configured according to the present invention.

FIG. 4 is a perspective view of a speaker.

FIG. 5 is a sectional view of a cabinet of the speaker device according to the present invention.

FIG. 6 is an enlarged sectional view showing a fitting structure of a rear cabinet half and a front cabinet half constituting a main cabinet part.

FIG. 7 is an enlarged sectional view showing a structure of a speaker mounting portion.

FIG. 8 is a graph showing a distribution of port sound pressure levels in a bass reflex system.

FIG. 9 is a graph showing a distribution of port sound pressure levels in the Kelton system.

FIG. 10 is a graph showing a distribution of port sound pressure levels in a double bass reflex system.

FIG. 11 is a perspective view of a television receiver incorporating a speaker device according to the present invention as viewed from the front side.

FIG. 12 is a perspective view of a main part of the television receiver as viewed from the rear side.

FIG. 13 is a sectional view showing a conventional bass reflex type speaker device.

FIG. 14 is a sectional view showing a conventional Kelton type speaker device.

FIG. 15 is a sectional view showing a conventional double bass reflex type speaker device.

[Explanation of symbols]

 (1) Speaker (2) Cabinet (21) Main cabinet (22) Secondary cabinet (23) Port

Claims (1)

(57) [Claims] In a speaker device in which a speaker (1) is arranged in a cabinet (2), the cabinet (2) has a main cabinet part (21), a sub-cabinet part (22) and a port part ( 23) are sequentially connected to each other to form a cylindrical shape, and the speaker for mounting the speaker (1) toward the outside of the main cabinet (21) is provided at each of the two openings of the main cabinet (21). A speaker device comprising mounting portions (3) and (4).