JP2009225110A - Speaker unit and speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain high acoustic reproduction performance by preventing the distortion of fluctuation in a speaker unit which can be connected in parallel. <P>SOLUTION: An input terminal 11 and a transmitting terminal 12 provided on an external surface of a woofer 1 are arranged with a positional relationship in which the terminals are point-symmetrical with a center point 14a of a voice coil 14 as a center when the woofer 1 is seen from the front. Also, leading thread lines 17 and 18 are wired so that when the woofer 1 is seen from the front, wiring amounts of the leading thread lines 17 and 18 in each of four spaces S1-S4, which are formed in the woofer 1 by a virtual line V1 passing through the center point 14a of the voice coil 14 and connecting the input terminal 11 and the transmitting terminal 12 and a virtual line V2 passing through the center point 14a of the voice coil 14 and vertical to the virtual line V1 may become approximately the same. Specifically, the leading thread lines 17 and 18 are wired to be line-symmetrical with the virtual line V1 as a symmetrical axis, and also to be line-symmetrical with the virtual line V2 as a symmetrical axis. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a speaker unit that outputs sound by vibrating a diaphragm based on a supplied electric signal and a speaker system including a plurality of the speaker units.

For example, AV devices and audio devices such as television receivers are provided with speaker units that output sound based on supplied sound signals (electrical signals). In the speaker unit, sound is output by inputting a sound signal (current) to a voice coil and vibrating the air with a diaphragm (cone). At this time, with a single speaker unit, there is a limit to the sound reproduction performance in each of the high and low sound bands, and it is difficult to obtain high sound reproduction performance for both sound ranges.
Therefore, conventionally, a single speaker system (so-called 2 way speaker, 3 way speaker) is combined with a plurality of speaker units having different reproduction bands such as a woofer (for a low frequency band), a squawker (for a medium frequency band), a tweeter (for a high frequency band). Etc.) may be configured. In the speaker system, a plurality of speaker units are connected in parallel, so that the same audio signal is input to each speaker unit. A technique for connecting a plurality of speaker units in parallel is disclosed in Patent Document 1, for example.
Specifically, Patent Document 1 discloses a speaker unit including an input terminal to which an external signal line for inputting an audio signal is connected, and a speaker and a feed terminal connected in parallel to the input terminal ( (See FIG. 5 of Patent Document 1). Then, by connecting the input terminal of the next speaker unit to the feed terminal of the speaker unit, these speaker units are connected in parallel.
Japanese Utility Model Publication No. 4-112590

By the way, in the speaker unit, sound is output by vibrating the diaphragm and vibrating the air. Therefore, in order to obtain high sound reproduction performance, it is desirable to prevent distortion of vibration in the speaker unit.
However, in the schematic circuit diagram of FIG. 5 of Patent Document 1, when the speaker unit is viewed from the front, a wiring path from the input terminal to above the speaker and to the feed terminal is described. If wiring is actually made in such a wiring path, the wire material wired in the speaker unit will be unevenly distributed, resulting in distortion in the vibration of the speaker unit and a decrease in sound reproduction performance. Problem arises.
Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to prevent vibration distortion in a speaker unit that can be connected in parallel and obtain high sound reproduction performance.

In order to achieve the above object, the present invention provides a voice coil for vibrating a diaphragm based on a supplied electric signal, and a pair of external signal lines provided on the outer surface of the speaker unit for transmitting the electric signal. Are applied to a speaker unit comprising an input terminal and a feed terminal connected to each other, and an internal signal line connecting the voice coil and the feed terminal in parallel to the input terminal inside the speaker unit. , Which satisfies the following requirements (1) and (2).
(1) When the speaker unit is viewed from the front, the input terminal and the feed terminal are arranged in a positional relationship that is point-symmetric about the center point of the voice coil.
(2) When the internal signal line is viewed from the front of the speaker unit, the internal signal line passes through the central point of the voice coil and the first virtual line connecting the input terminal and the feed terminal, and the central point of the voice coil. The second virtual lines perpendicular to the first virtual lines are wired so that the wiring amounts of the internal signal lines in each of the four spaces formed in the speaker unit are substantially the same.

Thereby, in the speaker unit according to the present invention, the above requirements (1) and (2) are satisfied, and the wiring amount of the internal signal line in each of the four spaces is the same. Distortion can be prevented and high sound reproduction performance can be obtained.
For example, when the speaker unit is viewed from the front, the internal signal line is symmetric with respect to the first imaginary line as an axis of symmetry and symmetric with respect to the second imaginary line as an axis of symmetry. A configuration in which wiring is performed in this manner is conceivable. Thus, by making the wiring shapes of the internal signal lines in each of the four spaces substantially the same, vibration distortion can be reduced and higher sound reproduction performance can be obtained.
Specifically, the internal signal line includes a pair of first internal signal lines that connect the input terminal and the feed terminal through both outer sides of the voice coil, and each of the first internal signal lines. In the case of including a pair of second internal signal lines connected to the voice coil, a connection portion between the first internal signal line and the second internal signal line is on the second virtual line. It is conceivable that the voice coil is configured to be located on both outer sides of the voice coil. With such a configuration, it is possible to realize a configuration in which the wiring shapes of the internal signal lines in each of the four spaces are substantially the same. According to this configuration, since the wiring distance can be shortened as compared with the case where wiring is individually performed from the input terminal to the feed terminal and the voice coil, the amount of wiring inside the speaker unit is reduced. The effect on sound quality can be reduced.
The present invention may be understood as a speaker system including a plurality of the speaker units. In the speaker system configured as described above, when the speaker units are arranged in the same direction along the first imaginary line, the wiring between the speaker units can be linearly connected at the shortest distance. It is also possible to prevent chatter noise caused by the wiring coming into contact with the casing of the speaker system.

According to the present invention, in the speaker unit according to the present invention, the requirements (1) and (2) are satisfied, and the wiring amounts of the internal signal lines in each of the four spaces are the same. Can be prevented from being distorted and high sound reproduction performance can be obtained.
In particular, when viewed from the front of the speaker unit, the internal signal line is symmetric with respect to the first imaginary line as an axis of symmetry and symmetric with respect to the second imaginary line as an axis of symmetry. Since the internal signal lines in each of the four spaces have substantially the same wiring shape, vibration distortion is reduced and higher sound reproduction performance can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
Here, FIG. 1 is a schematic diagram of a main part when the speaker system X according to an embodiment of the present invention is viewed in plan, and FIG. 2 is a schematic diagram of a main part when the speaker system X is viewed from the front.
First, a schematic configuration of the speaker system X according to the embodiment of the present invention will be described with reference to FIG.
The speaker system X is provided in, for example, an AV device or an audio device such as a television receiver. As shown in FIG. 1, the woofer 1 that is a speaker unit for a low frequency band, A tweeter 2 which is a speaker unit is built in the system casing 3. For example, when the speaker system X is built in a television receiver, a configuration in which the casing of the television receiver is the system casing 3 is conceivable.
The speaker system X described in the present embodiment is a so-called 2-way speaker having two speaker units, the woofer 1 and the tweeter 2, but the present invention is configured by connecting three or more speaker units in parallel. It can also be applied to other speaker systems.

The woofer 1 includes a casing 10, an input terminal 11, a feed terminal 12, a bobbin 13, a voice coil 14, a diaphragm 15, a magnet 16, a yarn introduction wire 17, a yarn introduction wire 18 (see FIG. 2), and the like. It is configured. The tweeter 2 has a vibration system stroke smaller than that of the woofer 1 and is configured with a small diameter and a low mass. However, the basic structure is the same as that of the woofer 1, and the same reference numerals are given. Therefore, the description is omitted.
The input terminal 11 and the feed terminal 12 are provided on the outer surface of the casing 10. The input terminal 11 connects, for example, a pair of external signal lines 41 that transmit audio signals (electrical signals) from an external device such as a tuner to the yarn introduction wire 17, and the feed terminal 12 is connected to the yarn introduction wire 17. Are connected to a pair of external signal lines 42.

In the speaker system X, the external signal line 41 is connected to the input terminal 11 of the woofer 1, and the feed terminal 12 of the woofer 1 and the input terminal 11 of the tweeter 2 are connected by the external signal line 42. Thus, the woofer 1 and the tweeter 2 are connected in parallel. Accordingly, the audio signal transmitted from the external signal line 41 is simultaneously input to the woofer 1 and the tweeter 2 and reproduced.
As will be described later with reference to FIG. 2, in the woofer 1 and the tweeter 2, the input terminal 11 and the feed terminal 12 are arranged at symmetrical positions with respect to the center. Therefore, when the woofer 1 and the tweeter 2 are arranged side by side in a straight line, the external signal line 42 can be wired in a straight line with the shortest distance, and must be routed around the outer periphery of the woofer 1 or the tweeter 2. There is no. Therefore, chatter noise generated when the external signal line 42 comes into contact with the system housing 3 and vibrates can be prevented. Further, the size of the system housing 3 can be reduced, which is suitable for a television receiver or the like that is desired to be thin in recent years.

The bobbin 13 is coupled to one end of the diaphragm 15, and the voice coil 14 is formed on the outer periphery of the bobbin 13 by winding a copper wire. The voice coil 14 is for vibrating the diaphragm 15 based on electric signals supplied to both ends thereof.
The diaphragm 15 is a cone-shaped diaphragm having a substantially conical shape that expands from one end on the side coupled to the bobbin 13 to the other end, and the other end via an edge 15a. It is fixed to the casing 10.
The magnet 16 is a permanent magnet or the like for causing a magnetic flux to act on the voice coil 14, and is formed in a ring shape having a hole larger than the voice coil 14 in the center. The magnet 16 is fixed in a position where a predetermined gap is formed between the inner periphery of the hole of the magnet 16 and the outer periphery of the voice coil 14.
In the woofer 1, when a voice signal (current) is input to the voice coil 14, the bobbin 13 vibrates by a force acting on the voice coil 14 based on Fleming's left-hand rule. As a result, the diaphragm 15 coupled to the bobbin 13 vibrates and air vibrates, so that sound based on the sound signal is output.

On the other hand, inside the woofer 1, the input terminal 11 and the feed terminal 12 are connected by two (±) yarn introduction wires 17 (corresponding to a pair of first internal signal lines). The yarn introduction wire 17 and the voice coil 14 are connected to each other at the connecting portion 19 by two (±) yarn introduction wires 18 (corresponding to a pair of second internal signal lines). That is, in the woofer 1, the voice coil 14 and the feed terminal 12 are connected in parallel to the input terminal 11 by the yarn introduction wires 17 and 18 (an example of internal signal lines) wired inside the woofer 1. ing.
Here, the lead wires 17 and 18 are formed by winding ultrafine copper wire (copper foil) around a tinsel, etc., and have excellent bending resistance, and are resistant to metal fatigue due to vibrations. have. In addition, the lead wire may be referred to as a copper wire, a tinsel wire, a lead wire, or the like.

By the way, as described above, in the woofer 1, sound is output by vibrating the diaphragm 15 to vibrate air. Therefore, in order to obtain high sound reproduction performance, the vibration distortion in the woofer 1 is obtained. It is desirable to prevent this.
Therefore, in the woofer 1 according to the embodiment of the present invention, the distortion of the vibration in the woofer 1 is prevented by devising the wiring structure of the yarn lead wires 17 and 18 inside the woofer 1. .
Hereinafter, this point will be described with reference to FIG. FIG. 2 is a schematic diagram of a main part when the speaker system X is viewed from the front, and shows a cross section taken along the line AA ′ in FIG.
Here, the imaginary line V1 (corresponding to the first imaginary line) shown in FIG. 2 is a line that passes through the center point 14a of the voice coil 14 and connects the input terminal 11 and the feed terminal 12, and an imaginary line V2 (second line). Is a line that passes through the center point 14a of the voice coil 14 and is perpendicular to the virtual line V1. The virtual lines V1 and V2 equally divide the internal space of the woofer 1 into four spaces S1 to S4.

As shown in FIG. 2, in the woofer 1, the yarn introduction wire 17 has a pair of yarn introduction wires 17 a and 17 b that pass through both outer sides of the voice coil 14. The yarn introduction wire 18 has a pair of yarn introduction wires 18a and 18b for connecting the yarn introduction wires 17a and 17b to the voice coil 14, respectively. The yarn introduction wires 17a and 17b and the yarn introduction wires 18a and 18b are connected by soldering or the like.
Here, the connecting portions 19a and 19b of the yarn introduction wire 17a and the yarn introduction wire 18a, and the yarn introduction wire 17b and the yarn introduction wire 18b are near both outer sides of the voice coil 14 on the virtual line V2. Is located. The voice coil 14 is arranged so that both ends of the copper wire forming the voice coil 14 are located on both outer sides of the voice coil 14 on the virtual line V2. Further, the yarn introduction wire 18 may be omitted, and the voice coil 14 and the yarn introduction wire 17 may be directly connected.

On the other hand, in the woofer 1, as shown in FIG. 2, the input terminal 11 and the feed terminal 12 are symmetric with respect to the center point 14 a of the voice coil 14 when the woofer 1 is viewed from the front. Arranged in a relationship. That is, a relationship is established in which the position where the input terminal 11 is rotated by 180 ° about the center point 14 a of the voice coil 14 coincides with the position of the feed terminal 12.
In the woofer 1, when the woofer 1 is viewed from the front, when the yarn introduction lines 17 and 18 are viewed as a single figure, the woofer 1 is symmetric with respect to the virtual line V 1 as an axis of symmetry, and the virtual line A line-symmetrical relationship with V2 as the axis of symmetry is established. That is, the yarn introduction wire 17a and the yarn introduction wire 17b are in a line-symmetric relationship with the virtual line V1 as the symmetry axis, and each of the yarn introduction wire 17a and the yarn introduction wire 17b has the virtual line V2 as the symmetry axis. As line symmetry. Similarly, the yarn introduction wire 18a and the yarn introduction wire 18b are in a line-symmetric relationship with the virtual line V1 as the axis of symmetry. Further, since each of the yarn introduction wire 18a and the yarn introduction wire 18b is on the virtual line V2, it can be said that the yarn introduction line 18a and the yarn introduction line 18b are line symmetric with respect to the virtual line V2.

In this way, in the woofer 1, when the woofer 1 is viewed from the front as shown in FIG. 2, the yarn introduction wires 17 and 18 are formed in the woofer 1 by the virtual lines V1 and V2. Wiring is performed so that the wiring amount in each of the spaces S1 to S4 is substantially the same. Therefore, vibration distortion in the woofer 1 can be prevented, and high sound reproduction performance can be maintained. The wiring structure of the yarn lead wires 17 and 18 shown in FIG. 2 is merely an example, and other shapes may be used as long as the wiring amounts in the spaces S1 to S4 are substantially the same. .
The voice coil 14 is connected to the input terminal 11 by connecting the yarn introduction wire 18 to the yarn introduction wire 17 in the vicinity of both outer sides of the voice coil 14. Since the wiring distance can be shortened as compared with the case where wiring is separately performed from 11, the amount of wiring inside the woofer 1 can be reduced and the influence on the sound quality can be reduced.

  The present invention can be used for AV equipment and audio equipment such as a television receiver including a plurality of speaker units connected in parallel.

The principal part schematic diagram when the speaker system which concerns on embodiment of this invention is planarly viewed. The principal part schematic diagram when the speaker system which concerns on embodiment of this invention is viewed from the front.

Explanation of symbols

1 ... woofer (example of speaker unit)
2 ... Tweeter (an example of a speaker unit)
3 ... System housing 41, 42 ... External signal line 10 ... Casing 11 ... Input terminal 12 ... Feeding terminal 13 ... Bobbin 14 ... Voice coil 14a ... Center point 15 ... Diaphragm 15a ... Edge 16 ... Magnets 17, 17a, 17b ... Lead wire (example of first internal signal line)
18, 18a, 18b ... yarn introduction wire (an example of a second internal signal line)
19, 19a, 19b ... connection portion V1 ... virtual line (an example of a first virtual line)
V2 ... Virtual line (an example of a second virtual line)
X ... Speaker system

Claims (4)

A voice coil for vibrating the diaphragm based on the supplied electrical signal, an input terminal and a feed terminal provided on the outer surface of the speaker unit and connected to a pair of external signal lines for transmitting the electrical signal; A speaker unit comprising an internal signal line connecting the voice coil and the feed terminal in parallel to the input terminal inside the speaker unit,
When the speaker unit is viewed from the front, the input terminal and the feed terminal are arranged in a positional relationship that is symmetric with respect to the center point of the voice coil.
When the internal signal line is viewed from the front of the speaker unit, the first virtual line that passes through the center point of the voice coil and connects the input terminal and the feed terminal, and the center point of the voice coil passes through the first signal line. The speaker is characterized in that the wiring amount of the internal signal line in each of the four spaces formed in the speaker unit by the second virtual line perpendicular to the virtual line is substantially the same. unit.   The internal signal line is line symmetric with the first imaginary line as a symmetric axis and the line symmetric with the second imaginary line as a symmetric axis when the speaker unit is viewed from the front. The speaker unit according to claim 1, wherein the speaker unit is wired. The internal signal line includes a pair of first internal signal lines that connect the input terminal and the feed terminal through both outer sides of the voice coil, and each of the first internal signal lines to the voice coil. A pair of second internal signal lines to be connected,
The speaker unit according to claim 2, wherein a connection portion between the first internal signal line and the second internal signal line is located on both outer sides of the voice coil on the second virtual line.   A speaker system comprising a plurality of speaker units according to claim 1.

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