JPH0633746Y2 - Speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a speaker device in which a plurality of speakers having different reproduction bands are attached to a cabinet for use, and is particularly generated when a front decorative plate of the cabinet is attached and detached. The present invention relates to a speaker device capable of automatically compensating for changes in timbre.

[Prior Art] As is well known, a typical structure of a speaker device that is generally used as an audio device is that a plurality of speakers having different reproduction bands are attached to a front plate of a cabinet, as is well known. The speaker is connected to the input terminal through a dividing circuit designed according to each reproduction band, and a front decorative plate is attached to the front surface of the cabinet for protection and decoration of the speaker.

This front decorative plate is usually fixed to the front plate of the cabinet by attaching a woven cloth, a wire net or a perforated plate with many small holes to the frame, or the acoustic effect of the front decorative plate during reproduction. In consideration of avoiding the above, it is detachably attached and used with a coupler.

[Problems to be Solved] In the conventional speaker device having such a structure, the woven cloth, the wire mesh or the perforated plate having a large number of small holes used for the front decorative plate has the sound absorbing property, In particular, this sound absorption property is remarkable at high frequencies, and there is a problem that the tone color of the reproduced sound changes when the front decorative plate is attached and removed.

Therefore, an object of the present invention is to solve the problems of the above-described conventional example by automatically switching the characteristics of the divided circuit according to the attachment / detachment of the front decorative plate.

[Means for Solving Problems] A speaker device according to the present invention for achieving the above object will be described with reference to FIGS. 1 to 3 showing an embodiment.
The present invention relates to a speaker device having a front decorative plate that can be attached to and detached from a cabinet, and includes a coupling tool A2 provided on the front decorative panel 1 and a coupling tool provided on the cabinet 3 corresponding to the coupling tool A2. The tool B4, the characteristic switching means 5 interrupted by the coupling tool A2 and / or the coupling tool B4, the dividing circuit 6 whose characteristic is switched by the characteristic switching means 5 according to the attachment / detachment state of the front decorative plate 1, and A speaker device comprising a speaker 7 electrically connected to the division circuit 6.

[Operation] In the speaker device having such a configuration, by attaching the front decorative plate 1 to the front surface of the cabinet 3, for example, in the first embodiment shown in FIG. 1 and FIG. The projection 2a attached to the decorative plate 1 is inserted into the recessed hole of the catcher 4a attached to the cabinet as a coupler B4 called a catcher, and the push switch 5a installed inside the coupler B4 switches the characteristics. By pressing the operation portion 5b of the means 5, the division circuit 6 connected to the tweeter 7a is switched to the high gain side, the reproduced sound level of the tweeter 7a is increased, and the absorption amount by the front decorative plate 1 is canceled. Maintain the normal tone of the reproduced sound.

When the front decorative plate 1 is removed, the operating portion of the characteristic switching means 5 is released from the pressed state by the coupling tool A2, the division circuit 6 is switched to the low gain side, and the reproduced sound level of the tweeter 7a is changed to the front decoration. It returns to the proper level when there is no absorption by the plate 1.

[Embodiment] FIGS. 1 and 2 show a first embodiment of the present invention, in which a connector B is provided on the front surface of a cabinet 3 together with a woofer 7b, a tweeter 7a and the like.
4 are attached at predetermined places (3 places on one side in the drawing, 6 places in total), and the connecting tool B4 is usually called a catcher 4a, has a bottomed cylindrical shape made of synthetic resin, and is opened on the front surface of the cabinet 3. It is buried with the part facing outward.

At the bottom of the catcher 4a, a push switch 5a is arranged as a characteristic switching means 5 in a state of being embedded in the cabinet 3 together with the catcher 4a.

The push switch 5a is connected to the division circuit 6 which is connected to the tweeter 7a.

Reference numeral 1 denotes a front decorative plate, which has a structure in which a decorative woven fabric is adhered to a frame body, and a projection 2a made of synthetic resin is attached to the back surface as a coupling tool B2 at a position corresponding to the catcher 4a.

Protrusion 2a for attaching front decorative plate 1 to cabinet 3
When is inserted into the catcher 4a, the operating portion 5b of the push switch 5a is pressed, the attenuator resistor R1 of the division circuit 6 shown in FIG. 2 as an example is short-circuited, the input voltage of the tweeter 7a rises, and the level of the reproduced sound is increased. Get higher

When the front decorative plate 1 is removed, the push switch 5a is opened and the attenuator resistor R1 is connected in series with the tweeter 7a to suppress the reproduction level.

The value of the attenuator resistance R1 is such that the attenuation amount cancels the attenuation of the tweeter reproduction band by the front decorative plate 1.
Set in association with the tweeter 7a impedance.

In the divided circuit of the first embodiment, the normal attenuator for manually adjusting the gain of the tweeter 7a is omitted, but a constant resistance type attenuator may be used together with the attenuator resistor R1.

FIG. 3 shows a second embodiment of the present invention in which a pair of catchers 4a among a plurality of catchers mounted on the cabinet 3 and a pair of projections of the front decorative plate 1 corresponding thereto are provided.
2a is made conductive, and the pair of protrusions 2a are formed by jumper wires 5c.
, To provide mutual conduction, and the division circuit 6 connects the input side of the coupling capacitor C1 and the input side of the preliminary coupling capacitor C2 to the input terminal 8 of the speaker device (the division circuit for the woofer 7b is omitted). When the output side of the pre-coupling condenser C2 is connected to one of the pair of catchers 4a and the other catcher 4a is connected to the output side of the coupling capacitor C1, and the front decorative plate 1 and the cabinet 3 are mounted,
A pair of catchers 4a of the cabinet 3 are jumper wires
5c short-circuits each other and the coupling capacitor C1 and the pre-coupling capacitor C2 are connected in parallel. As a result, the capacity of the coupling capacitor increases and the reproduction level of the tweeter rises.

In this embodiment, a constant resistance type attenuator is used for adjusting the level of the tweeter 7a, but a separate attenuator resistor may be provided to short-circuit the same as in the first embodiment.

Similarly, also in the first embodiment, a method of changing the capacitance of the coupling capacitor may be adopted as in the second embodiment.

Although the speaker device according to the present invention has been described above in detail based on an example considered to be typical, the embodiment of the speaker device according to the present invention is not limited to the structure of the above-mentioned embodiment, and may be, for example, the above-mentioned second embodiment. In the embodiment, instead of making the catcher 4a conductive, a normal catcher may be equipped with a contact piece made of a conductive material.

Furthermore, using multiple pairs of catchers and protrusions independently,
The supply capacitor, attenuator resistance, choke coil, etc. can be switched at the same time, and in a multi-way speaker device that uses more speakers, it can be applied not only to tweeters but also to circuits such as super tweeters and squawkers. In the structure for switching the characteristics of the divided circuit by attaching and detaching the decorative plate 1 and compensating the reproduction level of the tweeter, etc., the constituent features described in the above-mentioned claims are provided, and the function referred to in the present invention is exhibited, which will be described below. As long as it has an effect, it can be appropriately modified and implemented.

[Effects] The speaker device according to the present invention switches the characteristics of the divided circuit by attaching and detaching the decorative plate 1, and automatically compensates the reduction in the reproduction level of the tweeter caused by the acoustic resistance of the front decorative plate 1, so Due to the necessity, the reproduced sound quality does not change even if the front decorative plate 1 is removed or used in a mounted state.

With the above advantages, there is an effect that it is possible to meet extremely various purposes and requirements.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of the first embodiment, FIG. 2 is a sectional view of a main part of the same and a combined circuit diagram of FIG. 3, and FIG. . 1 is a whole decorative plate, 2 is a coupling A, 3 is a cabinet, 4
Is a coupling tool B, 5 is characteristic switching means, 6 is a dividing circuit, and 7 is a speaker.

Claims (1)

[Scope of utility model registration request] 1. A speaker device having a front decorative plate detachable from a cabinet, the front decorative plate (1).
A (2) provided on the cabinet and a coupler B (4) provided on the cabinet (3) corresponding to the coupler A (2).
A characteristic switching means (5) incorporated in the coupling tool A (2) and / or the coupling tool B (4), and the characteristic switching means (5).
A speaker comprising a division circuit (6) whose characteristics are switched according to the attachment / detachment state of the front decorative plate (1) and a speaker (7) electrically connected to the division circuit (6). apparatus.