JP3141602B2 - Speaker - 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 used for audio equipment for automobiles and the like.

[0002]

2. Description of the Related Art In recent years, a glass antenna having a structure in which a thin-film conductor is adhered to an upper portion of a rear glass has been used as a radio antenna of an automobile instead of a bar-shaped bar antenna. This glass antenna has the following problems.

[0003] Generally, a sound device for a vehicle has a speaker disposed behind a rear seat of the vehicle (hereinafter referred to as a rear tray). In this case, the distance between the speaker and the glass antenna is extremely short. And the distance is 40
Only about 50cm. Also, an electric wire called a harness for transmitting music signals is connected to the speaker,
This harness is installed from the radio set located in the front center of the vehicle cabin to the rear speaker through the side of the car floor, and is generated when ignition noise and various electrical components are switched on and off. Noise, and the noise generated by the antilock braking system, etc., jump in, and these noises are radiated from the speakers placed on the rear tray, enter the glass antenna and input to the radio set, and the amplified noises And the noise is heard.

[0004] The most effective method of countermeasures against noise is to connect a capacitor between one of the terminals of the speaker connected to the harness and the body ground, but there is no method currently practiced for cost reasons.

A conventional loudspeaker of this type will be described below. However, since no loudspeaker has been implemented from the past to the present, a capacitor is connected between one of the loudspeaker terminals and the frame by a general method. The method for connecting the terminals will be described.

FIG. 6 is a perspective view of a speaker to which a capacitor is connected by a general method as viewed from the back. In FIG. 6, a magnetic circuit 2 and a connector terminal 3 are coupled to a frame 1,
The auxiliary terminal plate 5 having the ground lug 4 is a metal eyelet 6
Is fixed to the frame 1 by caulking.
A capacitor 9 is provided between the terminals 7 and 8 of the auxiliary terminal plate 5.
Are connected by soldering, and one end of the capacitor 9 is electrically connected to the frame 1 via the terminal 8, the ground lug 4, and the eyelet 6.

Further, one terminal 10 of the connector terminal 3
Is connected to one end of a coated lead wire 12 in addition to a conductive wire referred to as a gold wire 11, and the other end is connected to a terminal 7,
The covered lead wire 12 is fixed to a clamp 13 provided on the frame 1 via a protective tube 14.
As described above, when viewed electrically, the terminal 10 of the connector terminal 3
The structure is such that a capacitor 9 is connected between the power supply and the frame 1.

Next, a structural section of the conventional speaker will be described. However, since the connection of the capacitor 9 has already been described, it is omitted here to avoid duplication.

FIG. 7 is a schematic half sectional view showing the structure of the speaker. 7, a magnetic circuit 2 is constituted by a lower plate 16 having a center pole 15, a ring-shaped magnet 17, and a ring-shaped upper plate 18, and a frame 1 is coupled to an upper surface of the magnetic circuit 2. The suspension 21 supports an intermediate portion of the voice coil 19 so that the lower portion of the voice coil 19 fits into the magnetic gap 20 of the magnetic circuit 2 without being eccentric.
It is stuck to.

Further, the outer peripheral portion of the diaphragm 22 is fixed to the frame 1 together with the gasket 23, and the central portion of the diaphragm 22 and the upper part of the voice coil 19 are connected.
A dust cap 24 is affixed to the center upper surface of 2.

A lead wire 25 of the voice coil 19 is a gold wire 1 by an eyelet 26 caulked on the surface of the diaphragm 22.
1 and the other end of the gold wire 11 is connected to the frame 1
The lead wire 25 is fixed to the diaphragm 22 by applying an adhesive so as to cover the lead wire 25. Here, the lead wire 25 and eyelet 26 of the voice coil 19, the gold wire 1
1 is a pair, and the illustrated gold wire 11, connector terminal 3, and terminal 10 are not sectional views.

The operation of the conventional speaker configured as described above will be described below. First, when an input signal is applied from the connector terminal 3 to the voice coil 19 through the terminal 10 and the gold wire 11, the voice coil 19 is driven according to Fleming's left-hand rule, and the diaphragm 22 is vibrated by the driving force. Emits sound into the air.

Next, the operation of the capacitor 9 will be described. FIG. 8 is a circuit diagram schematically illustrating the relationship between the wiring of the radio set and the speaker and the antenna. In FIG. 8, 27
Is a radio set whose output is supplied to a speaker 30 through harnesses 28 and 29. Since the frame of the speaker 30 is screwed to the body of the automobile, the harness 2
The noise 31 that has jumped into 8, 29 flows from the capacitor 9 to the body earth via the frame and screws of the speaker 30. That is, since the noise 31 is grounded, the noise is not radiated from the speaker 30 to the antenna 32, and the noise can be reduced.

[0014]

However, in the above-mentioned conventional structure, not only separate parts such as the ground lug 4, the auxiliary terminal plate 5, the coated lead wire 12, the protective tube 14 and the like are required, but also both ends of the coated lead wire 12. And the number of steps is increased, such as fixing the protective tube 14 through the coated lead wire 12 with the clamp portion 13, and the cost is very high.

Furthermore, since a base for mounting the auxiliary terminal plate 5 must be formed on the frame 1 and the clamp portion 13 must be provided, the frame 1 must be newly provided, and the cost for manufacturing the mold is high. There were also problems.

In addition, since the capacitor 9 is held only by soldering its lead wires to the terminals 7 and 8, the capacitor 9 body is merely hung in the air, so that the capacitor 9 is soldered by vibration during running of the vehicle. There is also a quality problem that the lead wire of the portion is cut and the capacitor 9 falls off.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a speaker in which a capacitor is connected between one terminal of a connector terminal and a frame with excellent quality and at low cost. .

[0018]

In order to solve this problem, a speaker according to the present invention is provided with a storage portion having a partition plate formed at the bottom on the outer wall of a connector terminal for connecting a lead wire of a voice coil. A capacitor in which a pair of lead wires is separated by the partition plate is inserted, and one of the lead wires of the capacitor is connected to the connector terminal, and the other is crimped to a frame via a groove provided at the bottom of the connector terminal. And electrically connected to each other.

[0019]

With this configuration, the capacitor is securely covered and fixed in the storage portion provided on the outer wall of the connector terminal, so that the capacitor does not fall off due to the vibration during running of the vehicle. Further, since the two lead wires of the capacitor are separated from the root by the partition plate formed at the bottom of the storage portion, short-circuiting due to contact between the lead wires can be achieved, and excellent quality can be obtained. .

Also, the need for a covered lead wire and an auxiliary terminal board for connecting the capacitor and the frame is eliminated, and the number of components is reduced, and the work of fixing the covered lead wire to the clamp provided on the frame is also unnecessary. It can be inexpensively finished. Furthermore, there is no need to provide a pedestal or a clamp for attaching the auxiliary terminal plate to the frame, and it is not necessary to newly install a frame, and the frame used in the past can be used as it is, so that there is no mold manufacturing cost. It will be.

[0021]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a perspective view of a speaker according to a first embodiment of the present invention as viewed from the back. In FIG. 1, a U-shaped storage section 34 is provided on the side surface of a connector terminal 33 made of a resin molded product, and a downwardly-projecting partition plate 35 is provided at the bottom thereof. 34, the two lead wires 36,
37 are separated and inserted by a partition plate 35 so as not to contact each other.

A triangular groove 38 formed at the bottom of the connector terminal 33 is provided with one lead wire 36 of the capacitor 9.
Is arranged, and the connector terminal 33 and the frame 39 are connected to each other, so that the lead wire 36 is clamped and electrically connected to the frame 39 in a crimped state.

Further, the other lead 3 of the capacitor 9
7 is connected by soldering to one terminal 40 of the connector terminal 33 so that the capacitor 9 is electrically connected between the frame 39 and the terminal 40.

Here, the shape of the connector terminal 33 will be described in more detail. FIG. 2 is an exploded perspective view showing a state before the capacitor 9 is attached to the connector terminal 33 of the speaker in the embodiment. 2, when the capacitor 9 is inserted into the housing portion 34 of the connector terminal 33, the lead wires 36 and 37 are completely separated from each other by the convex partition plate 35.

The lead wire 37 is connected to a part of the terminal 40. When the protrusion 41 is provided as shown in FIG.
The workability and quality are improved because the lead wire 37 does not hinder the connection of the gold wire 11 to the wire.

On the other hand, the lead wire 36 is connected to the connector terminal 3.
3 is disposed in a groove 38 provided at the bottom of the connector terminal 33.
Is connected by caulking the frame 39 and the eyelets 42 through the holes 43. At this time, the size of the groove 38 is
When the wire 6 is inserted, the lead wire 36 and the metal frame 39 are brought into contact with each other so that a slight portion of the lead wire 36 protrudes and is electrically connected.

With the above-described configuration, the capacitor 9 is completely covered and fixed in the housing portion 34 of the connector terminal 33. Since the wires 36 and 37 are not cut off and the partition plate 35 separates the leads 36 and 37 from the roots, the lead 3
Since a short circuit due to the contact between 6 and 37 does not occur, it is possible to finish the product with extremely excellent quality. In addition, the insulated lead wire and auxiliary terminal board described in the conventional example are not required, so that the number of components can be reduced, and the work of fixing the insulated lead wire to the frame with the clamp portion can be reduced, so that it is possible to finish at low cost. be able to.

Next, a structural cross section of the speaker according to this embodiment will be described. FIG. 3 is a schematic half sectional view showing the structure of the speaker in the embodiment. The cross-sectional structure is the same as that described in the conventional example, in which a frame 39 is connected to the upper surface of the magnetic circuit 2 and the gold wire 11 is connected by soldering to the terminal 40 of the connector terminal 33 fixed to the frame 39.

The operation of the thus constructed speaker according to the present embodiment will be described. First, as for the operation of radiating sound into the air, when an input signal is applied to the connector terminal 33, the voice coil 19 is driven in accordance with Fleming's left-hand rule, and the diaphragm 22 is driven. Is reproduced with amplitude.

Next, the operation of the capacitor 9 for reducing noise will be described. Similarly to the conventional example described with reference to FIG. 8, the frame 39 is connected to the body ground of the vehicle, so that the noise jumping into the harnesses 28 and 29 flows through the capacitor 9 to the body of the vehicle. ,
Since the antenna is not radiated, noise can be reduced.

As described above, according to the present embodiment, the U-shaped storage section 34 is provided on the outer wall of the connector terminal 33, and the convex partition plate 35 is provided at the bottom thereof, and the capacitor 9 is inserted into the storage section 34. One lead wire 36 of the capacitor 9 separated by the partition plate 35 is arranged in a groove 38 provided at the bottom of the connector terminal 33 and connected to a frame 39,
By connecting the other lead wire 37 to the terminal 40 by soldering and electrically connecting the capacitor 9 between the terminal 40 and the frame 39, the number of parts and the number of assembly steps are reduced and the cost is reduced. It is possible to provide a speaker to which a capacitor for reducing noise, which is extremely excellent in quality, is not attached even when the capacitor 9 is dropped even by the vibration of.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a perspective view of a speaker according to a second embodiment of the present invention as viewed from the back. In FIG. 4, a U-shaped storage portion 34 is provided on the outer wall of the connector terminal 33, and a convex partition plate 35 is provided at the bottom thereof.
The capacitor 9 is inserted into and fixed to the storage section 34, and one lead wire 37 of the capacitor 9 separated by the partition plate 35 is connected to the terminal 40 by soldering.

The above is the same as the structure of FIG. 1 shown in the first embodiment, and is different from the structure of FIG. 1 in that an eyelet 44 in which tin is plated on the surface of iron or brass is provided on the frame 39. The point is that the other lead wire 36 of the capacitor 9 is connected by soldering to the eyelet 44.

With the above configuration, the capacitor 9
Can be performed after the step of connecting the connector terminal 33 and the frame 39. That is, since the speaker can be assembled without mounting the capacitor 9 and then the capacitor 9 can be mounted in another process, there is no need to change the conventional speaker production process. Further, the lead 3 of the capacitor 9
6 are connected by soldering, the reliability of the connection is increased.

The operation of the above-structured speaker for emitting sound and the function of reducing noise are described in the first aspect of the present invention.
The description is omitted because it is the same as that described in the embodiment.

As described above, the U-shaped storage portion 34 and the partition plate 35 are provided in the connector terminal 33, the capacitor 9 is inserted into the storage portion 34 and fixed, and one lead wire 37 of the capacitor 9 is connected. Connected to the terminal 40 and the other lead wire 36
Is connected to the eyelet 44 which is caulked to the frame 39, so that the conventional production process can be used as it is, and it is possible to provide an inexpensive and high-quality speaker with a capacitor for reducing noise.

Embodiment 3 Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a perspective view of a speaker according to a third embodiment of the present invention as viewed from the back. In FIG. 5, a U-shaped storage portion 34 is provided outside the connector terminal 33, and a convex partition plate 35 is provided at the bottom thereof.
The capacitor 9 is inserted into and fixed to the storage section 34, and one lead wire 37 of the capacitor 9 separated by the partition plate 35 is connected to the terminal 40 by soldering.

The above is the same as the configuration of FIG. 1 described in the first embodiment. The difference from the configuration of FIG. 1 is that an L-shaped cut-and-raised portion 45 is provided on The other point is that the other lead wire 36 is wound around the cut-and-raised portion 45, the cut-and-raised portion 45 is bent in the direction of the arrow 46, the lead wire 36 is sandwiched, and the lead wire 36 is electrically connected to the frame 39.

With the above configuration, the capacitor 9 can be manufactured in another process without changing the conventional speaker production process.
Can be attached, and the eyelet 44 described with reference to FIG. 2 is not required, and the lead wire 36 of the capacitor 9 can be securely connected to the frame 39 even with a small number of components.

The operation of the above-structured speaker for emitting sound and the function of reducing noise are described in the first embodiment of the present invention.
The description is omitted because it is the same as that described in the embodiment.

As described above, the housing portion 34 and the partition plate 35 are provided in the connector terminal 33, the capacitor 9 is inserted into and fixed to the housing portion 34, and one lead wire 37 of the capacitor 9 is connected to the terminal 40. The other lead wire 36 was wound around the cut-and-raised portion 45, and the cut-and-raised portion 45 was bent and connected to the frame 39, so that a capacitor for reducing noise was attached at lower cost using the conventional production process. A speaker can be provided.

The noise reduction capacitor actually used is a film capacitor having a small loss, and its capacitance is 0.047 μF or more which does not affect the audible frequency band.
It is better to use one of about 1.0 μF.

Although the present embodiment has been described using a frame having a round diameter, it goes without saying that the frame may have an elliptical shape, a track shape, or a rectangular shape.

[0045]

As described above, the speaker according to the present invention has the following features.
A U-shaped housing portion is provided at the connector terminal and a convex partition plate is provided at the bottom thereof. A capacitor is inserted into and fixed to the housing portion, and the lead wires of the two capacitors are securely separated by the partition plate. By connecting one of the terminals to the terminal and the other to the frame, a speaker with an extremely high-quality capacitor for noise reduction can be installed without causing the capacitor to fall out or short-circuit due to contact between the leads. It can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a speaker according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a state before attaching a connector terminal of the speaker in the embodiment.

FIG. 3 is a half sectional view showing the structure of the speaker in the embodiment.

FIG. 4 is a perspective view showing a configuration of a speaker according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration of a speaker according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of a conventional speaker.

FIG. 7 is a half sectional view showing the structure of a conventional speaker.

FIG. 8 is a circuit diagram schematically illustrating a state of speaker wiring;

[Explanation of symbols]

 2 Magnetic circuit 9 Capacitor 11 Gold wire 33 Connector terminal 34 Storage part 35 Partition plate 36, 37 Lead wire 38 Groove 39 Frame 40 Terminal

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04R 9/02 B60R 11/02 H04R 9/04 103

Claims (3)

(57) [Claims] 1. A loudspeaker comprising: a frame connected to a magnetic circuit having a magnetic gap formed therein; and an outer peripheral portion of a diaphragm having a voice coil fitted into the magnetic gap coupled to a center portion connected to a peripheral edge of the frame. A connector terminal made of a resin in which a pair of terminals are incorporated into the frame, a lead wire of the voice coil is connected to the connector terminal, and a partition plate is formed on a bottom portion of an outer wall of the connector terminal. A storage part having a U-shape is provided, a capacitor having a pair of leads separated by the partition plate is inserted into the storage part, and one of the lead wires of the capacitor is connected to one of the connector terminals, and the other is connected to the other. A speaker electrically connected to the frame by crimping through a groove provided at the bottom of the connector terminal. 2. The speaker according to claim 1, wherein a terminal is connected to the frame in a conductive state, and one lead of the capacitor is connected to the other lead of the capacitor connected to the connector terminal. 3. An L-shaped cut-and-raised portion is provided on the frame, and one lead wire is arranged on the other of the capacitor and the other lead wire of the capacitor connected to the connector terminal. 2. The speaker according to claim 1, wherein the lead wires are electrically connected.