JPS6025192Y2 - Audio equipment with speakers - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an audio device with a speaker.

In conventional audio equipment with a speaker of this kind, a speaker consisting of a speaker horn and a speaker body integrated into one is installed at an opening position provided in advance in the cabinet.
It is also common to have a configuration in which a pre-obtained directional limiting means such as a directional limiting plate is disposed within the speaker horn and is attached to the cabinet.

For this purpose, the speaker horn and the speaker body are prepared separately in advance, and the first step is to assemble them, the second step is to attach this assembled structure to the cabinet, and the third step is to attach the directivity limiting means to the cabinet. A structure in which a speaker is installed in a cabinet, which requires at least the steps of It has the disadvantage that it cannot be easily obtained.

Therefore, the present invention aims to propose a new type of audio equipment with a speaker that does not have the above-mentioned drawbacks, and the following drawings show an example of the invention in which the audio equipment is a radio receiver with a cassette type tape recorder. This will become clear from the detailed explanation as an example.

In FIG. 1, 1 indicates a radio receiver with a cassette type tape recorder as a whole, which includes front and rear plates 3 and 4, left and right side plates 5 and 6, and upper and lower plates 7.
and 8, which can be made of a synthetic resin material, for example. Inside the cabinet 9, a cassette type tape recorder body (not shown) is placed on the left side, and a radio receiver body (not shown) is placed on the right side. are arranged respectively.

In this case, the front panel 3 of the cabinet 9 has a window 12 on its left side that allows rotation of the cassette holder 11 for mounting a cassette on the tape recorder body, and a window 12 on the upper side of the right side for radio reception. Dial scale plate 1 on the machine body
A window 15 having a transparent plate 14 that allows the window 3 to face outside is
At the bottom of this window 15, there are provided a tuning heir 16, a volume adjustment knob 17, a tone quality adjustment heir 18, etc., which are arranged sequentially from the right side. For playing the recorder, rewinding, fast forwarding,
An operation button 20 for stopping, etc. is provided on the right side, and an operator 21 for switching the band of the radio receiver body, etc., is provided on the right side, and handle portions 22 in the form of openings are provided on the left and right sides, respectively.

Since the above configuration is also found in ordinary radio receivers with cassette type tape recorders, further detailed explanation will be omitted. As can be seen with reference to the figures, the cabinet 9
For example, the front plate 3 has a plate portion 24 located below the window 12, which has a pair of upper and lower edges that curve outwardly in the left-right direction when viewed from the front side, and a left and right side edge that extends linearly in the vertical direction. an opening 25 having a relatively large size and having a generally rectangular shape as a whole, and a relatively steep opening 25 in a curved shape expressed by an exponential function or a hyperbolic function inwardly and backwardly from its upper and lower edges, respectively. Plate portions 26 and 27 that can be extended from the left and right edges, and plate portions 28 and 29 that can be smoothly extended inwardly and backwardly from the left and right edges in a curved shape expressed by an exponential function or a hyperbolic function, and a superior plate portion. 26 and 27, and a relatively small opening 30 formed in a rectangular shape at the rear edge of 28 and 29, thereby forming a portion of the cabinet 9 as a whole into a horn shape. is made integrally with the front plate 3.

In this case, the opening 30 is integrally formed with a peripheral flange 33 having threads 31 and 32 attached to the left and right sides, for attaching a speaker body 35, which will be described later and extends outward.

Further, a directivity limiting means formed integrally with the horn-shaped cabinet 9 is disposed within the cabinet 9 as a part thereof.

In this case, as shown in FIGS. 2 and 3, the directivity limiting means includes a plurality of directivity limiting plates 50 each having a U-shape when viewed in a cross section that extends in the vertical direction of the cabinet 9 in a direction perpendicular to the front panel of the cabinet 9. In the structure shown in FIG. 2 and 3, as shown in FIG. The configuration may be similar to that of FIGS. 2 and 3, except that the plate 50 is gradually inclined outward to the left and outward to the right.

The horn-shaped portion of the front plate 3 of the cabinet 9 described above is used as a speaker horn, and the speaker body 35 is attached to this horn.

In this case, the speaker body 35 is a cylindrical case 37 having an opening 36 at one end into which a drive mechanism (not shown) can be housed, as is clear with reference to FIGS. 2 and 3.
A diaphragm 38 having a hemispherical shape is disposed at the opening 36 of the case 37 so as to close the opening 36,
Attachment holes 39 and 4 that can extend outward integrally with the position.
There is a configuration in which a mounting plate portion 41 with a 0 is formed.

In this case, a truncated cone-shaped ring 45 is integrally formed around the diaphragm 38 at the opening 36 position of the case 37 of the speaker body 35 to improve the directivity of the sound waves generated by the diaphragm 38. It is permissible to do anything that will improve your performance.

Thus, the speaker main body 35 has its diaphragm 38 facing the opening 30 of the cabinet 9, and the mounting holes 39 and 40 of its mounting plate 41 are connected to the screws 31 and 32 of the peripheral flange 33 of the cabinet 9. The mounting holes 39 are aligned with each other.
The screws 47 and 48 are inserted into the screws 47 and 40, and the screws 47 and 48 are screwed together with the main screws 31 and 32, so that the cabinet 9 can be attached to the cabinet 9.

The above is an example of the configuration of the present invention. According to this configuration, '
The plate portion 24 of the front plate 3 of the cabinet 9 is formed into a horn shape, and a directivity limiting means that can be integrally formed with the horn portion is disposed within the horn portion, and the portion formed into the horn shape is used as a speaker horn. Since the speaker body is attached, it is clear that the speaker has a configuration in which the speaker has a speaker body, a speaker horn, and a directivity limiting means is arranged in the speaker horn, and is attached to the cabinet. However, in this case, since the speaker horn is formed integrally with the cabinet 9 on the front plate 3 of the cabinet 9, and the directivity limiting means is formed integrally with this inside the horn, only the speaker body is attached to the cabinet 9. By simply doing this, it is possible to obtain a configuration in which a speaker equipped with a speaker horn and directivity limiting means is attached to a cabinet.

Therefore, there is no need to obtain the speaker body and the speaker horn separately, assemble them, and then attach the assembled structure to the cabinet, and also to attach the direction limiting means obtained in advance to the cabinet. Compared to audio equipment, the number of parts is reduced, assembly work is simplified, and there is no need to provide a window for installing a horn in the cabinet, so the strength of the cabinet is not reduced.

Further, the directivity limiting plate 50 is integrally molded with the horn inside the hall, and is arranged in a direction from the opening 30, that is, the horn entrance where the acoustic output from the speaker body 35 is input, or the vicinity thereof, toward the opening 25, which is the acoustic output outlet. Since the directional characteristics of the speaker body 35 in the mid-to-high range are improved, it also acts as a reinforcing member for the horn, reducing so-called horn squeal (the horn itself resonates at a specific frequency and generates resonance sound). ) has the great effect of preventing

In the above embodiment, a case has been described in which the directivity limiting plate 50 is integrally coupled with the horn at the horn inlet (opening 30), but the present invention is not limited to this. Alternatively, it may extend from near the inlet toward the outlet.

Further, in the above description, the case where the plate portion 24 at the lower left side position of the front plate 3 of the cabinet 9 is formed in a horn shape has been described, but the entire front plate 3 may be formed in a horn shape. It is also possible.

Further, in the above description, the plate portion of the front plate 3 of the cabinet 9 has a substantially rectangular opening 25, plate portions 26, 27, 2B and 29 which can be extended rearward and inward through the opening 25, and a second plate portion 26, 27.2
8 and 29, the opening 30 is formed into a rectangular shape and the opening 30 is formed into a more horn shape. It can be formed into a horn shape with a conically extending plate part and an opening formed at the rear edge of the plate part, or can be made into various other shapes.

Furthermore, although the above description deals with the case where the audio equipment is a radio receiver with a cassette-type tape recorder, the present invention is not limited to this, and applies to audio equipment with speakers such as radio receivers, cassette-type tape recorders, etc. The invention may be applied and various other modifications may be made.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of an audio device with a speaker according to the present invention, Fig. 2 is an enlarged front view showing an example of the main part of the invention, Fig. 3 is a sectional view taken along the line ■-■, FIG. 4 is an enlarged front view similar to FIG. 2 showing another example of the essential parts of the present invention. In the figure, 3 is the front plate, 9 is the cabinet, 24 is the plate part, 35
1 and 2 respectively indicate the speaker bodies.

Claims (1)

[Scope of utility model registration request] In audio equipment with a speaker such as a radio receiver using a synthetic resin cabinet, a speaker horn is provided in the opening of the front panel of the cabinet and has an internal shape whose cross-sectional area gradually widens from the entrance to the exit of the acoustic output. The outlet is disposed, and a directivity limiting plate extending from the inlet of the horn or near the inlet in a direction toward the outlet is disposed, and the horn and the directivity limiting plate are integrally molded with the front plate. An audio device with a speaker characterized by: