JPH05168074A - Composite speaker - Google Patents

Abstract

PURPOSE:To improve the quality by preventing the short-circuiting of lead wires of the coil of a split circuit and the generation of an abnormal sound caused by the contact with a supporter in the composite speaker used for a vehicle, etc. CONSTITUTION:A supporter 17 is provided with two grooves 18 and 19 and triangular ribs 20 and 21 inside of it. Spaces 24 and 25 smaller than the diameter of the lead wires 22 and 23 of a coil 16 are provided between the tips of the ribs 20 and 21 and the grooves 18 and 19, and the lead wires 22 and 23 are arranged at the bottom of the ribs 20 and 21. Thus, the superior composite speaker without short-circuiting of the lead wires 22 and 23 and an abnormal sound generation can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite type speaker used for automobiles and the like.

[0002]

2. Description of the Related Art In recent years, in order to improve the interior acoustic performance of automobiles, there has been a composite type speaker in which a speaker unit for low-pitched sound reproduction (hereinafter referred to as "woofer") and a speaker unit for mid-high-pitched sound reproduction (hereinafter referred to as tweeter) are incorporated. It has become popular.

A conventional composite type speaker in which a split circuit is housed inside a conventional hollow supporter will be described below with reference to the drawings.

FIG. 6 (a) is a cross-sectional view of a composite type loudspeaker in which a conventional split circuit disclosed in Japanese Patent Laid-Open No. 61-139185 is housed in a hollow supporter. Figure 6 (a)
In, the frame 2 is coupled to the magnetic circuit 1, the peripheral edge of the diaphragm 3 is fixed to the peripheral edge of the frame 2, and the magnetic gap 4 of the magnetic circuit 1 is attached to the center of the diaphragm 3.
A voice coil 6 whose middle portion is supported by a damper 5 is coupled so as to be properly fitted into the center of the magnetic circuit 1, and a supporter 7 erected on the center pole of the magnetic circuit 1 is projected upward from the center portion of the diaphragm 3 to support the supporter 7. Top of 7 and diaphragm 3
The dust cap 8 is attached to the upper surface of the supporter 7, and the tweeter 9 is fixed on the supporter 7. The supporter 7 is made of a resin molded product and has a hollow shape. A split circuit including a capacitor 10 and a coil 11 is housed inside the supporter 7.

FIG. 6B is a perspective view of the supporter of the conventional example, in which terminals 12 and 13 are provided on the upper surface of the supporter 7, and the terminals 12 and 13 connect the coil 11, the capacitor 10 and the tweeter 9, respectively. The connection between them was relayed.

The operation of the composite speaker constructed as described above will be described below. First, when an input signal is applied to the woofer, the voice coil 6 moves up and down according to Fleming's left-hand rule, and this force causes the diaphragm 3 to move.
Oscillates and emits sound into the air. Also, capacitor 1
A high frequency component of the input signal is supplied to the tweeter 9 by a division circuit composed of 0 and the coil 11, and a mid-high sound is radiated into the air.

[0007]

However, in the configuration of the above-mentioned conventional composite type speaker, the lead wire 1 of the coil 11 is used.
Since the diaphragm 4 contacts the inner wall of the supporter 7, the diaphragm 3
However, there is a problem in that the lead wire 14 and the supporter 7 are also excited when they vibrate, and they come into contact with each other to generate an abnormal sound called flicker.

The lead wire 14 is a hollow supporter 7.
Since it has entered inside, the two lead wires 14
It is difficult to completely separate the lead wires from the outside and lead wires 14 come into contact with each other to cause an electrical short circuit, resulting in a fatal defect. Moreover, the lower end portion 15 of the tweeter 9 is made of iron, and the lead wire 1
Although it is necessary to avoid the contact between the lower end portion 15 and the wire 4, it is difficult to avoid this contact only by forming the lead wire 14, and there is a problem that the quality is not stable.

The present invention solves the above-mentioned problems of the prior art. The coil lead wire and the supporter are not connected to each other to generate an abnormal sound, and moreover, the lead wires are electrically short-circuited with each other, or It is intended to provide a composite type speaker with excellent quality in which the metal part of the tweeter does not come into contact with the tweeter.

[0010]

In order to achieve this object, the composite speaker of the present invention is provided with two grooves for drawing out the lead wire of the coil in a supporter for accommodating the coil. A triangular rib is provided inside, and the gap between the tip of the rib and the side wall of the groove is smaller than the diameter of the lead wire, and the lead wire is arranged at the bottom of the rib.

[0011]

With this structure, the two grooves provided in the supporter completely separate the lead wires of the coil, so that the lead wires do not come into contact with each other and electrically short-circuit. Further, since the lead wire makes only contact with the bottom of the triangular rib, abnormal noise called flicker does not occur. Moreover, the lead wire can be completely separated from the metal portion at the lower end portion of the tweeter by arranging the lead wire at the lower portion of the triangular rib.

[0012]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state before a tweeter, a coil and a supporter of the present invention are attached to a woofer.

In FIG. 1, reference numeral 16 is a coil which is inserted into a hollow supporter 17 which is a resin molded product. The supporter 17 has grooves 18, 19 and triangular ribs 20, 21 in the grooves 18, 19. The ribs 20 and 21 are provided with tips and grooves 1
The lead wires 22 of the coil 16 are provided between the side walls 8 and 19.
There are gaps 24 and 25 that are slightly narrower than the diameter dimension of 23. The lead wires 22 and 23 are passed through the gaps 24 and 25 and arranged at the bottoms of the triangular ribs 20 and 21, and the tweeter 27 to which the capacitor 26 is fixed and electrically connected is connected to the claw 28 provided on the supporter 17. Inset Tweeter 27
And the lead wires 22 and 23 of the coil 16 are electrically connected.

Next, the supporter 17 has a woofer 3 at the bottom thereof.
The voice coil 32 of No. 1 is inserted from the upper side, and is coupled to the woofer 31 from the bottom surface of the lower plate 33 using the screw 34. In the lower part of the supporter 17, a urethane foam having a cylindrical shape, which is referred to as an anti-metal cushion 35, is mounted, and the lower surface of the anti-metal cushion 35 is fixed to the diaphragm 36 of the woofer 31.
The vibrating plate 36 has its peripheral edge fixed to the frame 37, and the central part is connected to the voice coil 32. The lead wire of the voice coil 32 is connected to the gold wire 38, 39 on the surface of the vibrating plate 36.
Connected to each of the conductive lines. One ends of the gold thread wires 38, 39 are connected to the frame 37 by the terminals 4 of the terminal board 40.
1, 42, and the other end is woofer 31 and tweeter 27.
Terminals 29, 4 of the tweeter 27 so that they are connected in parallel.
Connect with 3 by soldering.

Next, the grooves 18 and 19 and the triangular ribs 20 and 21 provided on the supporter 17 will be described in some detail. FIG. 2 is an enlarged perspective view of the upper portion of the supporter.

In FIG. 2, triangular ribs 20 and 21 are provided inside the grooves 18 and 19, and gaps 24 and 25 are provided between the tips of the ribs 20 and 21 and the side walls of the grooves 18 and 19. .. The dimension L of the gaps 24 and 25 is slightly smaller than the diameter dimension d of the lead wires 22 and 23 of the coil 16.
<D, finish the lead wires 22 and 23 from above
Lead wires 22 and 23 are arranged at the bottoms of the triangular ribs 20 and 21 through the ribs 4 and 25.

Next, the cross-sectional structure of this composite type speaker will be described. FIG. 3 is a structural sectional view of the composite speaker in the first embodiment of the present invention.

In FIG. 3, a lower plate 33 having a center pole 44, a ring-shaped magnet 45, and a ring-shaped upper plate 46 form a magnetic circuit 47, and a frame 37 is coupled to the upper surface thereof. In addition, the suspension 49 is arranged so that the lower portion of the voice coil 32 is properly fitted into the magnetic gap 48 of the magnetic circuit 47.
Holds the middle portion of the voice coil 32 and fixes it to the frame 37, and affixes the peripheral edge of the diaphragm 36 to the frame 37 together with the gasket 50. 31 is configured.

Next, the tweeter 27 will be described. A magnetic circuit is formed by a cylindrical plate 53 and a cylindrical plate 53 inside the yoke 51, and the housing 24 is fixed to the outside of this magnetic circuit. Further, the voice coil 56 is coupled to the lower side of the diaphragm 55 so that the lower portion of the voice coil 56 is correctly fitted in the magnetic gap 57. Further, an equalizer 58 is arranged above the diaphragm 55 to form a tweeter 27. In addition, the coil 16 is inserted and adhered to the hollow supporter 17, and the tweeter 27 is fitted and fixed to the claw 28 from above, and the triangular rib 20 provided in the groove 18 of the supporter 17.
The lead wire 22 of the coil 16 is arranged at the bottom of the lead wire 22, and the end of the lead wire 22 is soldered to the terminal 29 of the tweeter 27.
Further, the nut 59, which is previously mounted inside the supporter 17, is tightened by the screw 34 inserted from the bottom surface of the lower plate 33 to join the supporter 17, and the cylindrical anti-dust is provided between the supporter 17 and the diaphragm 36. The upper and lower surfaces of the cushion 35 are attached to form a speaker.

With the above construction, the lead wires 22 and 23 of the coil 16 only slightly contact the ribs 20 and 21, so that the vibration plate 36 oscillates to excite the supporter 17 and the lead wires 22 and 23. There is no abnormal sound called flicker. Further, the lead wires 22 and 23 are completely separated from the root along the grooves 18 and 19, so that the lead wires 22 and 23 can be prevented from coming into contact with each other.
Further, since the dimension L of the gaps 24, 25 between the ribs 20, 21 and the side walls of the grooves 18, 19 is made slightly smaller than the diameter dimension d of the lead wires 22, 23, once the gaps 24, 2 are formed.
If the lead wires 22 and 23 are passed through 5, the wire will not return to the top again. That is, since the lead wires 22 and 23 can be arranged completely under the ribs 20 and 21, the lead wires 22 and 23 are not connected to the yoke 51 of the tweeter 27, and the quality is extremely excellent. The ribs 20 and 21 are formed in a triangular shape in order to facilitate the passage of the lead wires 22 and 23 from above. If the tips of the ribs 20 and 21 are rounded, this workability is further improved.

Next, the electrical relationship between the woofer 31 and the tweeter 27 will be described. FIG. 4 is an electric circuit diagram showing the relationship between the divided circuits of the speaker according to the first embodiment of the present invention.

As can be seen from FIG. 4, the woofer 31 directly receives the input signal, and the tweeter 27 has a low frequency component of -12d due to the division circuit including the coil 16 and the capacitor 26.
B / Oct. The input signal interrupted by is supplied.

The operation of the composite speaker constructed as above will be described below. First, woofer 3
When input signals are applied from the terminals 41 and 42 of No. 1, the voice coil 32 moves up and down according to Fleming's left hand rule, and this force causes the diaphragm 36 to oscillate and emit sound into the air. Also, the high frequency component of the input signal is the tweeter 27.
Similarly, the diaphragm 55 is supplied to the voice coil 56 of the
Oscillates and emits a high tone in the air.

As described above, according to this embodiment, the coil 1
The supporter 17 accommodating 6 is provided with two grooves 18 and 19 for drawing out the lead wires 22 and 23, and triangular ribs 20 and 21 are provided therein, and the tips of the ribs 20 and 21 and the groove 18 are provided. The gaps 24 and 25 from the side walls of the lead wires 22, 19 are made smaller than the diameters of the lead wires 22, 23.
By arranging 23 at the bottom of the ribs 20 and 21, the lead wires 22 and 23 do not come into contact with the supporter and abnormal noise is not generated, and the lead wires 22 and 23 come into contact with each other to achieve electrical conductivity. It is also possible to short to the lead wire 22,
It is possible to provide a speaker with excellent quality without the 23 coming into contact with the metal part such as the yoke 51 of the tweeter 27.

(Second Embodiment) A second embodiment of the present invention will be described below. FIG. 5 is an enlarged perspective view of a triangular rib provided inside the groove of the supporter of the composite type speaker according to the second embodiment of the present invention.

As shown in FIG. 5, a triangular rib 60 is provided.
1 is different from FIG. 1 only in that a notch 61 for arranging the lead wires 22 and 23 of the coil 16 is provided in the lower part of FIG. 1, and other configurations are the same as those in FIG. Omit it. As described above, the notch 61 is provided as shown in FIG. 5, and the lead wires 22, 23 of the coil 16 are provided in the notch 61.
By arranging the lead wires 22 and 23 easily, the positions of the lead wires 22 and 23 are determined, and the lead wires 22 and 23 can be pulled out uniformly, so that the lead wires 22 and 23 do not come into contact with a place other than the cut 61, It is possible to further improve the quality with respect to the occurrence of abnormal sound. Also, the triangular rib 6
It is also useful to provide a roundness 62 at the tip of 0 so that the lead wires 22 and 23 can be easily passed from above.

In the first and second embodiments, a drawing is shown in which only one triangular rib is provided for each groove, but it is also possible to have a plurality of ribs. There is no end.

[0028]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, there is provided a supporter for accommodating a coil, in which a lead wire of the coil is drawn out.
By arranging the groove of the book, providing a triangular rib inside the groove, and arranging the lead wire at the bottom of the rib by making the gap between the tip of this rib and the side wall of the groove smaller than the diameter dimension of the lead wire. No abnormal noise is generated between the supporter and the lead wire, and the lead wires come into contact with each other to cause an electrical short circuit. The lead wire also comes into contact with the metal part such as the tweeter yoke. It is possible to realize a composite speaker that is extremely excellent in terms of quality.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a composite speaker according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a coil and a supporter of the composite speaker according to the first embodiment.

FIG. 3 is a structural cross-sectional view of the composite speaker according to the first embodiment.

FIG. 4 is an electric circuit diagram showing a relationship between division circuits of the composite speaker according to the first embodiment.

FIG. 5 is an enlarged perspective view of ribs provided on the supporter of the composite speaker according to the second embodiment of the present invention.

FIG. 6A is a structural cross-sectional view of a conventional composite speaker. FIG. 6B is a perspective view of a supporter of the conventional composite speaker.

[Explanation of symbols]

 16 coil 17 supporter 18, 19 groove 20, 21 rib 22, 23 lead wire 24, 25 gap 26 capacitor 27 tweeter 28 tab 29, 30, 41, 42, 43 terminal 31 woofer 32 voice coil 33 lower plate 34 screw 35 clasp Cushion 36 Vibration plate 37 Frame 38, 39 Gold wire 40 Terminal plate

Claims (2)

[Claims] 1. A hollow supporter that is coupled to a magnetic circuit of a speaker unit for bass reproduction and supports the speaker unit for mid-high range reproduction, and a coil for a split circuit is housed inside the supporter. The groove is provided with two grooves, and a triangular rib is provided inside the groove, and the gap between the tip of the rib and the side wall of the groove is smaller than the diameter of the lead wire. Composite speaker placed at the bottom of the. 2. The composite speaker according to claim 1, wherein a notch is provided in a lower portion of a triangular rib provided on the supporter, and a lead wire of the coil is arranged in the notch.